{"segment":[{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho ba c\u00e2u","temp":"fill_the_blank","correct":[[["40"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":"Trong \u0111\u1ee3t \u1ee7ng h\u1ed9 \u0111\u1ed3ng b\u00e0o b\u1ecb l\u0169 l\u1ee5t \u1edf mi\u1ec1n Trung, $40$ b\u1ea1n l\u1edbp $7A$ \u0111\u00e3 quy\u00ean g\u00f3p ti\u1ec1n. B\u1ea1n l\u1edbp tr\u01b0\u1edfng \u0111\u00e3 ghi l\u1ea1i s\u1ed1 ti\u1ec1n thu \u0111\u01b0\u1ee3c c\u1ee7a m\u1ed7i b\u1ea1n trong b\u1ea3ng sau (\u0111\u01a1n v\u1ecb ngh\u00ecn \u0111\u1ed3ng): <br\/><table><tr><th>2<\/th><th>2<\/th><th>3<\/th><th>2<\/th><th>5<\/th><th>3<\/th><th>2<\/th><th>8<\/th><th>2<\/th><th>5<\/th><\/tr><tr><td>10<\/td><td>2<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>10<\/td><td>5<\/td><td>3<\/td><td>2<\/td><td>2<\/td><\/tr><tr><td>6<\/td><td>7<\/td><td>7<\/td><td>4<\/td><td>5<\/td><td>5<\/td><td>10<\/td><td>4<\/td><td>2<\/td><td>9<\/td><\/tr><tr><td>5<\/td><td>5<\/td><td>6<\/td><td>5<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>4<\/td><td>5<\/td><td>3<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 1: <\/b> S\u1ed1 \u0111\u01a1n v\u1ecb \u0111i\u1ec1u tra l\u00e0 _input_","explain":"<span class='basic_left'> S\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c th\u1ed1ng k\u00ea tr\u00ean $40$ b\u1ea1n h\u1ecdc sinh l\u1edbp $7A$ n\u00ean s\u1ed1 \u0111\u01a1n v\u1ecb \u0111i\u1ec1u tra l\u00e0 $40$. <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $40$.<\/span><\/span>"}]}],"id_ques":911},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho ba c\u00e2u","temp":"fill_the_blank","correct":[[["11"],["6"],["3"],["9"],["2"],["2"],["1"],["1"],["5"]]],"list":[{"point":5,"width":50,"content":"","type_input":"","ques":"Trong \u0111\u1ee3t \u1ee7ng h\u1ed9 \u0111\u1ed3ng b\u00e0o b\u1ecb l\u0169 l\u1ee5t \u1edf mi\u1ec1n Trung, $40$ b\u1ea1n l\u1edbp $7A$ \u0111\u00e3 quy\u00ean g\u00f3p ti\u1ec1n. B\u1ea1n l\u1edbp tr\u01b0\u1edfng \u0111\u00e3 ghi l\u1ea1i s\u1ed1 ti\u1ec1n thu \u0111\u01b0\u1ee3c c\u1ee7a m\u1ed7i b\u1ea1n trong b\u1ea3ng sau (\u0111\u01a1n v\u1ecb ngh\u00ecn \u0111\u1ed3ng): <br\/><table><tr><th>2<\/th><th>2<\/th><th>3<\/th><th>2<\/th><th>5<\/th><th>3<\/th><th>2<\/th><th>8<\/th><th>2<\/th><th>5<\/th><\/tr><tr><td>10<\/td><td>2<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>10<\/td><td>5<\/td><td>3<\/td><td>2<\/td><td>2<\/td><\/tr><tr><td>6<\/td><td>7<\/td><td>7<\/td><td>4<\/td><td>5<\/td><td>5<\/td><td>10<\/td><td>4<\/td><td>2<\/td><td>9<\/td><\/tr><tr><td>5<\/td><td>5<\/td><td>6<\/td><td>5<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>4<\/td><td>5<\/td><td>3<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 2: <\/b> \u0110i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng trong b\u1ea3ng ''t\u1ea7n s\u1ed1'' sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th>5<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>$N=40$<\/td><\/tr><\/table>","hint":"T\u1ea7n s\u1ed1 c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0 s\u1ed1 l\u1ea7n xu\u1ea5t hi\u1ec7n c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb trong d\u00e3y gi\u00e1 tr\u1ecb c\u1ee7a d\u1ea5u hi\u1ec7u.","explain":"<span class='basic_left'> Ta c\u00f3 b\u1ea3ng 't\u1ea7n s\u1ed1' d\u1ef1a theo b\u1ea3ng th\u1ed1ng k\u00ea ban \u0111\u1ea7u nh\u01b0 sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th>5<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>11<\/td><td>6<\/td><td>3<\/td><td>9<\/td><td>2<\/td><td>2<\/td><td>1<\/td><td>1<\/td><td>5<\/td><td>$N=40$<\/td><\/tr><\/table> <br\/><span class='basic_pink'>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0: $11;6;3;9;2;2;1;1;5$<\/span> <\/span>"}]}],"id_ques":912},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho ba c\u00e2u","temp":"fill_the_blank","correct":[[["27,5","27.5"],["15"],["7,5","7.5"],["22,5","22.5"],["5"],["5"],["2,5","2.5"],["2,5","2.5"],["12,5","12.5"]]],"list":[{"point":5,"width":50,"content":"","type_input":"","ques":"Trong \u0111\u1ee3t \u1ee7ng h\u1ed9 \u0111\u1ed3ng b\u00e0o b\u1ecb l\u0169 l\u1ee5t \u1edf mi\u1ec1n Trung, $40$ b\u1ea1n l\u1edbp $7A$ \u0111\u00e3 quy\u00ean g\u00f3p ti\u1ec1n. B\u1ea1n l\u1edbp tr\u01b0\u1edfng \u0111\u00e3 ghi l\u1ea1i s\u1ed1 ti\u1ec1n thu \u0111\u01b0\u1ee3c c\u1ee7a m\u1ed7i b\u1ea1n trong b\u1ea3ng sau (\u0111\u01a1n v\u1ecb ngh\u00ecn \u0111\u1ed3ng): <br\/><table><tr><th>2<\/th><th>2<\/th><th>3<\/th><th>2<\/th><th>5<\/th><th>3<\/th><th>2<\/th><th>8<\/th><th>2<\/th><th>5<\/th><\/tr><tr><td>10<\/td><td>2<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>10<\/td><td>5<\/td><td>3<\/td><td>2<\/td><td>2<\/td><\/tr><tr><td>6<\/td><td>7<\/td><td>7<\/td><td>4<\/td><td>5<\/td><td>5<\/td><td>10<\/td><td>4<\/td><td>2<\/td><td>9<\/td><\/tr><tr><td>5<\/td><td>5<\/td><td>6<\/td><td>5<\/td><td>10<\/td><td>3<\/td><td>2<\/td><td>4<\/td><td>5<\/td><td>3<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 3: <\/b> \u0110i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng th\u1ec3 hi\u1ec7n t\u1ea7n su\u1ea5t t\u01b0\u01a1ng \u1ee9ng c\u1ee7a t\u1eebng gi\u00e1 tr\u1ecb (t\u00ednh theo ph\u1ea7n tr\u0103m) trong b\u1ea3ng sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th>5<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>11<\/td><td>6<\/td><td>3<\/td><td>9<\/td><td>2<\/td><td>2<\/td><td>1<\/td><td>1<\/td><td>5<\/td><td>$N=40$<\/td><\/tr><tr><td>T\u1ea7n su\u1ea5t $(f)$<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>_input_%<\/td><td>100%<\/td><\/tr><\/table>","hint":"T\u1ea7n su\u1ea5t c\u1ee7a gi\u00e1 tr\u1ecb l\u00e0 t\u1ec9 s\u1ed1 c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb v\u00e0 s\u1ed1 t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c th\u1ed1ng k\u00ea.","explain":"<span class='basic_left'> T\u1ea7n su\u1ea5t t\u01b0\u01a1ng \u1ee9ng c\u1ee7a c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong b\u1ea3ng sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th>5<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>11<\/td><td>6<\/td><td>3<\/td><td>9<\/td><td>2<\/td><td>2<\/td><td>1<\/td><td>1<\/td><td>5<\/td><td>$N=40$<\/td><\/tr><tr><td>T\u1ea7n su\u1ea5t $(f)$<\/td><td>27,5%<\/td><td>15%<\/td><td>7,5%<\/td><td>22,5%<\/td><td>5%<\/td><td>5%<\/td><td>2,5%<\/td><td>2,5%<\/td><td>12,5%<\/td><td>100%<\/td><\/tr><\/table> <br\/><span class='basic_pink'>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0: $27,5;\\,15;\\, 7,5;\\,22,5;\\,5;\\,5;\\,2,5;\\,2,5;\\,12,5$<\/span> <br\/> <b> L\u01b0u \u00fd: <\/b> <i>T\u1ea7n su\u1ea5t $f$ c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: $f=\\dfrac{n}{N}$ trong \u0111\u00f3 $N$ l\u00e0 s\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb, $n$ l\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb. <br\/> - Ng\u01b0\u1eddi ta th\u01b0\u1eddng bi\u1ec3u di\u1ec5n t\u1ea7n su\u1ea5t d\u01b0\u1edbi d\u1ea1ng t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m. <\/i><\/span>"}]}],"id_ques":913},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"S\u1ed1 h\u1ecdc sinh \u0111i tham quan c\u1ee7a c\u00e1c l\u1edbp trong m\u1ed9t tr\u01b0\u1eddng THCS \u0111\u01b0\u1ee3c ghi trong b\u1ea3ng sau: <br\/> <table><tr><th>20<\/th><th>25<\/th><th>27<\/th><th>23<\/th><th>30<\/th><th>27<\/th><th>25<\/th><th>23<\/th><\/tr><tr><td>23<\/td><td>20<\/td><td>18<\/td><td>25<\/td><td>20<\/td><td>20<\/td><td>27<\/td><td>25<\/td><\/tr><tr><td>18<\/td><td>30<\/td><td>23<\/td><td>27<\/td><td>25<\/td><td>23<\/td><td>30<\/td><td>25<\/td><\/tr><\/table> <br\/> C\u00e2u n\u00e0o d\u01b0\u1edbi \u0111\u00e2y sai? ","select":["A. D\u1ea5u hi\u1ec7u \u1edf \u0111\u00e2y l\u00e0 s\u1ed1 h\u1ecdc sinh \u0111i tham quan c\u1ee7a m\u1ed7i l\u1edbp trong m\u1ed9t tr\u01b0\u1eddng THCS","B. S\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0 $24$","C. S\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb kh\u00e1c nhau c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0 $5$","D. S\u1ed1 c\u00e1c \u0111\u01a1n v\u1ecb \u0111i\u1ec1u tra l\u00e0 $24$"],"explain":"<span class='basic_left'> D\u1ea5u hi\u1ec7u \u1edf \u0111\u00e2y l\u00e0 s\u1ed1 h\u1ecdc sinh \u0111i tham quan c\u1ee7a m\u1ed7i l\u1edbp trong m\u1ed9t tr\u01b0\u1eddng THCS. <br\/> S\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0 $24$ <br\/> S\u1ed1 c\u00e1c \u0111\u01a1n v\u1ecb \u0111i\u1ec1u tra l\u00e0 $24$ <br\/> C\u00f3 $6$ gi\u00e1 tr\u1ecb kh\u00e1c nhau c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0: $18;20;23;25;27;30$ <br\/> Do \u0111\u00f3 c\u00e2u C sai. <br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span>","column":1}]}],"id_ques":914},{"time":24,"part":[{"title":"Kh\u1eb3ng \u0111\u1ecbnh sau \u0111\u00e2y \u0110\u00fang hay Sai","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" S\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a d\u1ea5u hi\u1ec7u \u0111\u00fang b\u1eb1ng s\u1ed1 c\u00e1c \u0111\u01a1n v\u1ecb \u0111i\u1ec1u tra. ","select":["\u0110\u00fang","Sai"],"explain":"<span class='basic_left'> \u1ee8ng v\u1edbi m\u1ed7i \u0111\u01a1n v\u1ecb \u0111i\u1ec1u tra c\u00f3 m\u1ed9t s\u1ed1 li\u1ec7u g\u1ecdi l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb c\u1ee7a d\u1ea5u hi\u1ec7u (k\u00ed hi\u1ec7u l\u00e0 $x$). S\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a d\u1ea5u hi\u1ec7u \u0111\u00fang b\u1eb1ng s\u1ed1 c\u00e1c \u0111\u01a1n v\u1ecb \u0111i\u1ec1u tra (k\u00ed hi\u1ec7u $N$). <br\/>Do \u0111\u00f3 kh\u1eb3ng \u0111\u1ecbnh \u0111\u00e3 cho l\u00e0 \u0111\u00fang. <br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 \u0110\u00fang.<\/span><\/span>","column":2}]}],"id_ques":915},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"T\u1ea7n su\u1ea5t $(f)$ c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: $f=\\dfrac{n}{N}$ trong \u0111\u00f3 $N$ l\u00e0 s\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb, $n$ l\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb. \u0110\u00fang hay Sai? ","select":["\u0110\u00fang","Sai"],"explain":"<span class='basic_left'> T\u1ea7n su\u1ea5t $f $ c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: $f=\\dfrac{n}{N}$ trong \u0111\u00f3 $N$ l\u00e0 s\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb, $n$ l\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb. <br\/> - Ng\u01b0\u1eddi ta th\u01b0\u1eddng bi\u1ec3u di\u1ec5n t\u1ea7n su\u1ea5t d\u01b0\u1edbi d\u1ea1ng t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m. <br\/> Do \u0111\u00f3 kh\u1eb3ng \u0111\u1ecbnh tr\u00ean l\u00e0 \u0111\u00fang.<br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 \u0110\u00fang.<\/span><\/span>","column":2}]}],"id_ques":916},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["20"],["3"],["5"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":"<span class='basic_left'>M\u1ed9t c\u1eeda h\u00e0ng ghi l\u1ea1i s\u1ed1 xe \u0111\u1ea1p b\u00e1n ra trong $14$ ng\u00e0y \u1edf b\u1ea3ng sau:<br\/><table><tr><th>15<\/th><th>16<\/th><th>12<\/th><th>10<\/th><th>12<\/th><th>15<\/th><th>16<\/th><\/tr><tr><td>12<\/td><td>15<\/td><td>10<\/td><td>20<\/td><td>16<\/td><td>15<\/td><td>15<\/td><\/tr><\/table> <br\/> H\u00e3y l\u1eadp b\u1ea3ng \u2018't\u1ea7n s\u1ed1'' v\u00e0 \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng trong c\u00e1c c\u00e2u sau: <br\/> - Gi\u00e1 tr\u1ecb c\u00f3 t\u1ea7n s\u1ed1 nh\u1ecf nh\u1ea5t l\u00e0 _input_ <br\/> - T\u1ea7n s\u1ed1 c\u1ee7a gi\u00e1 tr\u1ecb $12$ l\u00e0 _input_ <br\/> - T\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 _input_ <\/span>","explain":"<span class='basic_left'> Ta c\u00f3 b\u1ea3ng ''t\u1ea7n s\u1ed1'' sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>10<\/th><th>12<\/th><th>15<\/th><th>16<\/th><th>20<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>2<\/td><td>3<\/td><td>5<\/td><td>3<\/td><td>1<\/td><td>$N=14$<\/td><\/tr><\/table> <br\/> - Gi\u00e1 tr\u1ecb c\u00f3 t\u1ea7n s\u1ed1 nh\u1ecf nh\u1ea5t l\u00e0 $20$ <br\/> - T\u1ea7n s\u1ed1 c\u1ee7a gi\u00e1 tr\u1ecb $12$ l\u00e0 $3$ <br\/> - T\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 $5$<br\/> <span class='basic_pink'> V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 $20; 3; 5$<\/span><\/span>"}]}],"id_ques":917},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u ","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Ki\u1ec3m tra c\u00e2n n\u1eb7ng m\u1ed9t c\u00e1ch ng\u1eabu nhi\u00ean $20$ h\u1ecdc sinh c\u1ee7a l\u1edbp $7A,$ ta \u0111\u01b0\u1ee3c b\u1ea3ng th\u1ed1ng k\u00ea sau (\u0111\u01a1n v\u1ecb kg): <br\/><table><tr><th>42<\/th><th>37<\/th><th>45<\/th><th>46<\/th><th>37<\/th><th>45<\/th><th>42<\/th><th>43<\/th><th>37<\/th><th>42<\/th><\/tr><tr><td>38<\/td><td>40<\/td><td>45<\/td><td>37<\/td><td>40<\/td><td>37<\/td><td>45<\/td><td>38<\/td><td>44<\/td><td>42<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 1: <\/b> S\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb kh\u00e1c nhau c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0: ","select":["A. $5$","B. $6$","C. $7$","D. $8$"],"hint":"Li\u1ec7t k\u00ea c\u00e1c gi\u00e1 tr\u1ecb kh\u00e1c nhau c\u1ee7a d\u1ea5u hi\u1ec7u t\u1eeb b\u1ea3ng th\u1ed1ng k\u00ea \u0111\u00e3 cho.","explain":" <span class='basic_left'>C\u00e1c gi\u00e1 tr\u1ecb kh\u00e1c nhau c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0: $37; 38;40;42;43;44;45;46$ <br\/> S\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb kh\u00e1c nhau c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0 $8$.<br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span>","column":4}]}],"id_ques":918},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u","temp":"fill_the_blank","correct":[[["5"],["2"],["2"],["4"],["1"],["1"],["4"],["1"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":"Ki\u1ec3m tra c\u00e2n n\u1eb7ng m\u1ed9t c\u00e1ch ng\u1eabu nhi\u00ean $20$ h\u1ecdc sinh c\u1ee7a l\u1edbp $7A,$ ta \u0111\u01b0\u1ee3c b\u1ea3ng th\u1ed1ng k\u00ea sau (\u0111\u01a1n v\u1ecb kg): <br\/><table><tr><th>42<\/th><th>37<\/th><th>45<\/th><th>46<\/th><th>37<\/th><th>45<\/th><th>42<\/th><th>43<\/th><th>37<\/th><th>42<\/th><\/tr><tr><td>38<\/td><td>40<\/td><td>45<\/td><td>37<\/td><td>40<\/td><td>37<\/td><td>45<\/td><td>38<\/td><td>44<\/td><td>42<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 2: <\/b> \u0110i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng trong b\u1ea3ng ''t\u1ea7n s\u1ed1'' sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>37<\/th><th>38<\/th><th>40<\/th><th>42<\/th><th>43<\/th><th>44<\/th><th>45<\/th><th>46<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>$N=20$<\/td><\/tr><\/table>","explain":"<span class='basic_left'> Ta c\u00f3 b\u1ea3ng 't\u1ea7n s\u1ed1' d\u1ef1a theo b\u1ea3ng th\u1ed1ng k\u00ea ban \u0111\u1ea7u nh\u01b0 sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>37<\/th><th>38<\/th><th>40<\/th><th>42<\/th><th>43<\/th><th>44<\/th><th>45<\/th><th>46<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>5<\/td><td>2<\/td><td>2<\/td><td>4<\/td><td>1<\/td><td>1<\/td><td>4<\/td><td>1<\/td><td>$N=20$<\/td><\/tr><\/table> <br\/><span class='basic_pink'>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0: $5;2;2;4;1;1;4;1$<\/span> <\/span>"}]}],"id_ques":919},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u ","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Theo d\u00f5i $15$ chuy\u1ebfn xe kh\u00e1ch ch\u1ea1y t\u1eeb H\u00e0 N\u1ed9i \u0111\u1ebfn Nam \u0110\u1ecbnh ta c\u00f3 th\u1eddi gian ch\u1ea1y c\u1ee7a xe (\u0111\u01a1n v\u1ecb: ph\u00fat) \u0111\u01b0\u1ee3c ghi trong b\u1ea3ng s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea sau: <br\/><table><tr><th>110<\/th><th>115<\/th><th>115<\/th><th>90<\/th><th>120<\/th><\/tr><tr><td>110<\/td><td>120<\/td><td>90<\/td><td>95<\/td><td>105<\/td><\/tr><tr><td>120<\/td><td>95<\/td><td>90<\/td><td>85<\/td><td>105<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 1: <\/b> D\u1ea5u hi\u1ec7u \u0111i\u1ec1u tra l\u00e0: ","select":["A. Th\u1eddi gian xe kh\u00e1ch ch\u1ea1y t\u1eeb H\u00e0 N\u1ed9i \u0111\u1ebfn Nam \u0110\u1ecbnh","B. Th\u00e1i \u0111\u1ed9 ph\u1ee5c v\u1ee5 c\u1ee7a xe kh\u00e1ch","C. S\u1ed1 l\u01b0\u1ee3ng kh\u00e1ch c\u1ee7a tuy\u1ebfn H\u00e0 N\u1ed9i \u2013 Nam \u0110\u1ecbnh","D. An ninh c\u1ee7a tuy\u1ebfn xe kh\u00e1ch H\u00e0 N\u1ed9i \u2013 Nam \u0110\u1ecbnh"],"explain":" <span class='basic_left'>D\u1ea5u hi\u1ec7u \u0111i\u1ec1u tra l\u00e0 theo d\u00f5i th\u1eddi gian xe kh\u00e1ch ch\u1ea1y t\u1eeb H\u00e0 N\u1ed9i \u0111\u1ebfn Nam \u0110\u1ecbnh.<br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span>","column":1}]}],"id_ques":920},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u ","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Theo d\u00f5i $15$ chuy\u1ebfn xe kh\u00e1ch ch\u1ea1y t\u1eeb H\u00e0 N\u1ed9i \u0111\u1ebfn Nam \u0110\u1ecbnh ta c\u00f3 th\u1eddi gian ch\u1ea1y c\u1ee7a xe (\u0111\u01a1n v\u1ecb ph\u00fat) \u0111\u01b0\u1ee3c ghi trong b\u1ea3ng s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea sau: <br\/><table><tr><th>110<\/th><th>115<\/th><th>115<\/th><th>90<\/th><th>120<\/th><\/tr><tr><td>110<\/td><td>120<\/td><td>90<\/td><td>95<\/td><td>105<\/td><\/tr><tr><td>120<\/td><td>95<\/td><td>90<\/td><td>85<\/td><td>105<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 2: <\/b> N\u1ebfu th\u1eddi gian ch\u1ea1y d\u01b0\u1edbi $105$ ph\u00fat th\u00ec \u0111\u01b0\u1ee3c coi l\u00e0 xe ch\u1ea1y nhanh. H\u1ecfi c\u00f3 bao nhi\u00eau ph\u1ea7n tr\u0103m xe \u0111\u01b0\u1ee3c theo d\u00f5i \u0111\u01b0\u1ee3c coi l\u00e0 ch\u1ea1y nhanh? ","select":["A. $\\approx 33\\%$ ","B. $30\\%$","C. $40\\%$","D. $35\\%$"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> T\u00ecm s\u1ed1 chuy\u1ebfn xe ch\u1ea1y d\u01b0\u1edbi $105$ ph\u00fat <br\/> T\u00ednh t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m gi\u1eefa s\u1ed1 chuy\u1ebfn xe \u0111\u01b0\u1ee3c coi l\u00e0 ch\u1ea1y nhanh v\u1edbi t\u1ed5ng chuy\u1ebfn xe. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Trong $15$ chuy\u1ebfn xe th\u00ec ta th\u1ea5y c\u00f3 $6$ chuy\u1ebfn xe ch\u1ea1y d\u01b0\u1edbi $105$ ph\u00fat. <br\/> V\u1eady s\u1ed1 chuy\u1ebfn xe \u0111\u01b0\u1ee3c coi l\u00e0 ch\u1ea1y nhanh l\u00e0: <br\/> $\\dfrac{6}{15}\\cdot 100\\%=40\\%$ <br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span> <\/span>","column":4}]}],"id_ques":921},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u","temp":"fill_the_blank","correct":[[["20"],["5"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":"<span class='basic_left'>\u0110i\u1ec1u tra v\u1ec1 m\u1ee9c s\u1eed d\u1ee5ng n\u01b0\u1edbc m\u00e1y (t\u00ednh ra ${{m}^{3}}$ ) trong m\u1ed9t th\u00e1ng c\u1ee7a $20$ gia \u0111\u00ecnh c\u1ee7a m\u1ed9t t\u1ed5 d\u00e2n ph\u1ed1, ng\u01b0\u1eddi ta c\u00f3 b\u1ea3ng s\u1ed1 li\u1ec7u sau: <br\/><table><tr><th>S\u1ed1 th\u1ee9 t\u1ef1 gia \u0111\u00ecnh<\/th><th>M\u1ee9c n\u01b0\u1edbc s\u1eed d\u1ee5ng ($m^3$)<\/th><th>S\u1ed1 th\u1ee9 t\u1ef1 gia \u0111\u00ecnh<\/th><th>M\u1ee9c n\u01b0\u1edbc s\u1eed d\u1ee5ng ($m^3$)<\/th><\/tr><tr><td>1<\/td><td>T\u1eeb 10 \u0111\u1ebfn 15<\/td><td>11<\/td><td>$16-20$<\/td><\/tr><tr><td>2<\/td><td>$21-25$<\/td><td>12<\/td><td>$16-20$<\/td><\/tr><tr><td>3<\/td><td>$10-15$<\/td><td>13<\/td><td>$10-15$<\/td><\/tr><tr><td>4<\/td><td>$16-20$<\/td><td>14<\/td><td>$16-20$<\/td><\/tr><tr><td>5<\/td><td>$16-20$<\/td><td>15<\/td><td>Tr\u00ean $30$<\/td><\/tr><tr><td>6<\/td><td>$16-20$<\/td><td>16<\/td><td>$16-20$<\/td><\/tr><tr><td>7<\/td><td>$21-25$<\/td><td>17<\/td><td>$16-20$<\/td><\/tr><tr><td>8<\/td><td>$10-15$<\/td><td>18<\/td><td>$21-25$<\/td><\/tr><tr><td>9<\/td><td>$16-20$<\/td><td>19<\/td><td>$21-25$<\/td><\/tr><tr><td>10<\/td><td>$26-30$<\/td><td>20<\/td><td>$16-20$<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 1: <\/b> \u0110i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng trong c\u00e1c c\u00e2u sau \u0111\u1ec3 \u0111\u01b0\u1ee3c kh\u1eb3ng \u0111\u1ecbnh \u0111\u00fang. <br\/> - S\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0 _input_ <br\/> - S\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb kh\u00e1c nhau l\u00e0 _input_ <\/span>","explain":"<span class='basic_left'> T\u1eeb b\u1ea3ng s\u1ed1 li\u1ec7u ban \u0111\u1ea7u ta c\u00f3: <br\/>- S\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0 $20$ <br\/> - C\u00e1c gi\u00e1 tr\u1ecb kh\u00e1c nhau c\u1ee7a d\u1ea5u hi\u1ec7u l\u00e0: $10-15; 16-20; 21-25; 26-30;$ tr\u00ean $30$. <br\/> Do \u0111\u00f3 s\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb kh\u00e1c nhau l\u00e0 $5.$ <br\/> <span class='basic_pink'> V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 $20$ v\u00e0 $5$.<\/span><\/span>"}]}],"id_ques":922},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u ","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"<span class='basic_left'>\u0110i\u1ec1u tra v\u1ec1 m\u1ee9c s\u1eed d\u1ee5ng n\u01b0\u1edbc m\u00e1y (t\u00ednh ra ${{m}^{3}}$ ) trong m\u1ed9t th\u00e1ng c\u1ee7a $20$ gia \u0111\u00ecnh c\u1ee7a m\u1ed9t t\u1ed5 d\u00e2n ph\u1ed1, ng\u01b0\u1eddi ta c\u00f3 b\u1ea3ng s\u1ed1 li\u1ec7u sau: <br\/><table><tr><th>S\u1ed1 th\u1ee9 t\u1ef1 gia \u0111\u00ecnh<\/th><th>M\u1ee9c n\u01b0\u1edbc s\u1eed d\u1ee5ng ($m^3$)<\/th><th>S\u1ed1 th\u1ee9 t\u1ef1 gia \u0111\u00ecnh<\/th><th>M\u1ee9c n\u01b0\u1edbc s\u1eed d\u1ee5ng ($m^3$)<\/th><\/tr><tr><td>1<\/td><td>T\u1eeb 10 \u0111\u1ebfn 15<\/td><td>11<\/td><td>$16-20$<\/td><\/tr><tr><td>2<\/td><td>$21-25$<\/td><td>12<\/td><td>$16-20$<\/td><\/tr><tr><td>3<\/td><td>$10-15$<\/td><td>13<\/td><td>$10-15$<\/td><\/tr><tr><td>4<\/td><td>$16-20$<\/td><td>14<\/td><td>$16-20$<\/td><\/tr><tr><td>5<\/td><td>$16-20$<\/td><td>15<\/td><td>Tr\u00ean $30$<\/td><\/tr><tr><td>6<\/td><td>$16-20$<\/td><td>16<\/td><td>$16-20$<\/td><\/tr><tr><td>7<\/td><td>$21-25$<\/td><td>17<\/td><td>$16-20$<\/td><\/tr><tr><td>8<\/td><td>$10-15$<\/td><td>18<\/td><td>$21-25$<\/td><\/tr><tr><td>9<\/td><td>$16-20$<\/td><td>19<\/td><td>$21-25$<\/td><\/tr><tr><td>10<\/td><td>$26-30$<\/td><td>20<\/td><td>$16-20$<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 2: <\/b> M\u1ee9c s\u1eed d\u1ee5ng n\u01b0\u1edbc m\u00e1y c\u1ee7a m\u1ed7i gia \u0111\u00ecnh ch\u1ee7 y\u1ebfu trong kho\u1ea3ng n\u00e0o?","select":["A. $10-15\\,\\,(m^3)$ ","B. $16-20\\,\\,(m^3)$","C. $21-25\\,\\,(m^3)$","D. $26-30\\,\\,(m^3)$"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Gi\u00e1 tr\u1ecb n\u00e0o c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t th\u00ec \u0111\u00f3 l\u00e0 m\u1ee9c s\u1eed d\u1ee5ng n\u01b0\u1edbc m\u00e1y ch\u1ee7 y\u1ebfu c\u1ee7a m\u1ed7i gia \u0111\u00ecnh <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3 b\u1ea3ng '\u2018t\u1ea7n s\u1ed1'' sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>$10-15$<\/th><th>$16-20$<\/th><th>$21-25$<\/th><th>$26-30$<\/th><th>Tr\u00ean $30$<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>4<\/td><td>10<\/td><td>4<\/td><td>1<\/td><td>1<\/td><td>$N=20$<\/td><\/tr><\/table> <br\/> Theo b\u1ea3ng ''t\u1ea7n s\u1ed1'' tr\u00ean th\u00ec gi\u00e1 tr\u1ecb $16-20$ c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 $10$. <br\/> Do \u0111\u00f3 m\u1ee9c s\u1eed d\u1ee5ng n\u01b0\u1edbc m\u00e1y c\u1ee7a m\u1ed7i gia \u0111\u00ecnh ch\u1ee7 y\u1ebfu trong kho\u1ea3ng $16-20\\,\\, ({{m}^{3}} )$ <br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span> <\/span>","column":2}]}],"id_ques":923},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u ","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Khi \u0111i\u1ec1u tra s\u1ed1 h\u1ecdc sinh ti\u00ean ti\u1ebfn c\u1ee7a m\u1ed7i l\u1edbp trong m\u1ed9t tr\u01b0\u1eddng THCS, ng\u01b0\u1eddi \u0111i\u1ec1u tra \u0111\u00e3 ghi l\u1ea1i \u0111\u01b0\u1ee3c b\u1ea3ng s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea ban \u0111\u1ea7u sau: <br\/><table><tr><th>14<\/th><th>15<\/th><th>16<\/th><th>15<\/th><th>14<\/th><th>15<\/th><th>14<\/th><th>15<\/th><\/tr><tr><td>15<\/td><td>12<\/td><td>15<\/td><td>13<\/td><td>16<\/td><td>13<\/td><td>15<\/td><td>15<\/td><\/tr><tr><td>16<\/td><td>15<\/td><td>11<\/td><td>15<\/td><td>11<\/td><td>15<\/td><td>16<\/td><td>14<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 1: <\/b> B\u1ea3ng \u2018't\u1ea7n s\u1ed1'' t\u01b0\u01a1ng \u1ee9ng v\u1edbi b\u1ea3ng th\u1ed1ng k\u00ea ban \u0111\u1ea7u tr\u00ean l\u00e0: ","select":["A. <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>11<\/th><th>12<\/th><th>13<\/th><th>14<\/th><th>15<\/th><th>16<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>2<\/td><td>1<\/td><td>2<\/td><td>4<\/td><td>11<\/td><td>4<\/td><td>$N=24$<\/td><\/tr><\/table>","B. <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>11<\/th><th>12<\/th><th>13<\/th><th>14<\/th><th>15<\/th><th>16<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>2<\/td><td>2<\/td><td>2<\/td><td>4<\/td><td>10<\/td><td>4<\/td><td>$N=24$<\/td><\/tr><\/table>"],"explain":" <span class='basic_left'> B\u1ea3ng ''t\u1ea7n s\u1ed1'' theo \u0111\u00fang s\u1ed1 li\u1ec7u \u0111\u00e3 th\u1ed1ng k\u00ea ban \u0111\u1ea7u l\u00e0: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>11<\/th><th>12<\/th><th>13<\/th><th>14<\/th><th>15<\/th><th>16<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>2<\/td><td>1<\/td><td>2<\/td><td>4<\/td><td>11<\/td><td>4<\/td><td>$N=24$<\/td><\/tr><\/table> <br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span>","column":1}]}],"id_ques":924},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u","temp":"fill_the_blank","correct":[[["15"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":"Khi \u0111i\u1ec1u tra s\u1ed1 h\u1ecdc sinh ti\u00ean ti\u1ebfn c\u1ee7a m\u1ed7i l\u1edbp trong m\u1ed9t tr\u01b0\u1eddng THCS, ng\u01b0\u1eddi \u0111i\u1ec1u tra \u0111\u00e3 ghi l\u1ea1i \u0111\u01b0\u1ee3c b\u1ea3ng s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea ban \u0111\u1ea7u sau: <br\/><table><tr><th>14<\/th><th>15<\/th><th>16<\/th><th>15<\/th><th>14<\/th><th>15<\/th><th>14<\/th><th>15<\/th><\/tr><tr><td>15<\/td><td>12<\/td><td>15<\/td><td>13<\/td><td>16<\/td><td>13<\/td><td>15<\/td><td>15<\/td><\/tr><tr><td>16<\/td><td>15<\/td><td>11<\/td><td>15<\/td><td>11<\/td><td>15<\/td><td>16<\/td><td>14<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 2: <\/b> Gi\u00e1 tr\u1ecb c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 _input_","explain":"<span class='basic_left'> Ta c\u00f3 b\u1ea3ng ''t\u1ea7n s\u1ed1'' theo s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea ban \u0111\u1ea7u l\u00e0: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>11<\/th><th>12<\/th><th>13<\/th><th>14<\/th><th>15<\/th><th>16<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>2<\/td><td>1<\/td><td>2<\/td><td>4<\/td><td>11<\/td><td>4<\/td><td>$N=24$<\/td><\/tr><\/table> <br\/> Ta th\u1ea5y \u0111\u01b0\u1ee3c t\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 $11$ \u1ee9ng v\u1edbi gi\u00e1 tr\u1ecb $15$. <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $15$.<\/span><\/span>"}]}],"id_ques":925},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u","temp":"fill_the_blank","correct":[[["40"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":"Cho b\u1ea3ng ''t\u1ea7n s\u1ed1'' sau: <br\/><table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>152<\/th><th>156<\/th><th>160<\/th><th>164<\/th><th>168<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>3<\/td><td>6<\/td><td>12<\/td><td>10<\/td><td>9<\/td><td>$N$<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 1: <\/b> T\u1eeb b\u1ea3ng \u2018't\u1ea7n s\u1ed1'\u2019 tr\u00ean ta t\u00ednh \u0111\u01b0\u1ee3c $N$ b\u1eb1ng _input_","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>$N$ b\u1eb1ng t\u1ed5ng t\u1ea7n s\u1ed1 c\u1ee7a c\u00e1c gi\u00e1 tr\u1ecb <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: $N =3+6+12+10+9=40$ <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $40$.<\/span><\/span>"}]}],"id_ques":926},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u","temp":"fill_the_blank","correct":[[["22,5","22.5"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":"Cho b\u1ea3ng ''t\u1ea7n s\u1ed1'' sau: <br\/><table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>152<\/th><th>156<\/th><th>160<\/th><th>164<\/th><th>168<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>3<\/td><td>6<\/td><td>12<\/td><td>10<\/td><td>9<\/td><td>$N$<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 2: <\/b> T\u1ea7n su\u1ea5t c\u1ee7a gi\u00e1 tr\u1ecb $168$ l\u00e0 _input_ $\\%$","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>T\u1ea7n su\u1ea5t $f$ c\u1ee7a m\u1ed9t gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c $f=\\dfrac{n}{N}$ ($n$ l\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a gi\u00e1 tr\u1ecb, $N$ l\u00e0 s\u1ed1 c\u00e1c gi\u00e1 tr\u1ecb) <br\/> - T\u1ea7n su\u1ea5t $f$ th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ednh d\u01b0\u1edbi d\u1ea1ng t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m. <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: $N=40$ (theo c\u00e2u 1) <br\/> T\u1ea7n su\u1ea5t c\u1ee7a gi\u00e1 tr\u1ecb $168$ l\u00e0: <br\/> $f=\\dfrac{n}{N}=\\dfrac{9}{40}=0,225=22,5\\%$ <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $22,5$.<\/span><\/span>"}]}],"id_ques":927},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["1,5","1.5"],["4"],["4"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":" <span class='basic_left'>S\u1ed1 gi\u1edd t\u1ef1 h\u1ecdc c\u1ee7a $10$ h\u1ecdc sinh c\u1ee7a m\u1ed9t t\u1ed5 \u0111\u01b0\u1ee3c ghi l\u1ea1i nh\u01b0 sau: <br\/><table><tr><th>3<\/th><th>2<\/th><th>4<\/th><th>2<\/th><th>2<\/th><th>3<\/th><th>2<\/th><th>3<\/th><th>2,5<\/th><th>1,5<\/th><\/tr><\/table> <br\/> \u0110i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng trong c\u00e1c c\u00e2u sau: <br\/> - Gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t l\u00e0 _input_ <br\/> - Gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t l\u00e0 _input_ <br\/> - Gi\u00e1 tr\u1ecb $2$ c\u00f3 t\u1ea7n s\u1ed1 l\u00e0 _input_ <\/span>","explain":"<span class='basic_left'>Theo b\u1ea3ng th\u1ed1ng k\u00ea ban \u0111\u1ea7u, ta c\u00f3: <br\/> - Gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t l\u00e0 $1,5$ <br\/> - Gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t l\u00e0 $4$ <br\/> - Gi\u00e1 tr\u1ecb $2$ c\u00f3 t\u1ea7n s\u1ed1 l\u00e0 $4$ <br\/> <span class='basic_pink'> V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 $1,5; 4;4$.<\/span><\/span>"}]}],"id_ques":928},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u","temp":"fill_the_blank","correct":[[["2"],["4"],["17"],["5"],["2"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":"\u0110i\u1ec1u tra s\u1ed1 con c\u1ee7a $30$ gia \u0111\u00ecnh \u1edf m\u1ed9t khu d\u00e2n ph\u1ed1 cho k\u1ebft qu\u1ea3 trong b\u1ea3ng sau: <br\/> <table><tr><th>1<\/th><th>2<\/th><th>2<\/th><th>3<\/th><th>1<\/th><th>2<\/th><th>0<\/th><th>2<\/th><th>4<\/th><th>2<\/th><\/tr><tr><td>2<\/td><td>0<\/td><td>1<\/td><td>2<\/td><td>2<\/td><td>2<\/td><td>3<\/td><td>2<\/td><td>2<\/td><td>2<\/td><\/tr><tr><td>2<\/td><td>3<\/td><td>2<\/td><td>2<\/td><td>3<\/td><td>3<\/td><td>2<\/td><td>1<\/td><td>4<\/td><td>2<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 1: <\/b> \u0110i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng trong b\u1ea3ng ''t\u1ea7n s\u1ed1'' sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>0<\/th><th>1<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>_input_<\/td><td>$N=30$<\/td><\/tr><\/table>","explain":"<span class='basic_left'> Ta c\u00f3 b\u1ea3ng 't\u1ea7n s\u1ed1' d\u1ef1a theo b\u1ea3ng th\u1ed1ng k\u00ea ban \u0111\u1ea7u nh\u01b0 sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>0<\/th><th>1<\/th><th>2<\/th><th>3<\/th><th>4<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>2<\/td><td>4<\/td><td>17<\/td><td>5<\/td><td>2<\/td><td>$N=30$<\/td><\/tr><\/table><br\/><span class='basic_pink'>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 $2;4;17;5;2$.<\/span> <\/span>"}]}],"id_ques":929},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"\u0110i\u1ec1u tra s\u1ed1 con c\u1ee7a $30$ gia \u0111\u00ecnh \u1edf m\u1ed9t khu d\u00e2n ph\u1ed1 cho k\u1ebft qu\u1ea3 trong b\u1ea3ng sau: <br\/> <table><tr><th>1<\/th><th>2<\/th><th>2<\/th><th>3<\/th><th>1<\/th><th>2<\/th><th>0<\/th><th>2<\/th><th>4<\/th><th>2<\/th><\/tr><tr><td>2<\/td><td>0<\/td><td>1<\/td><td>2<\/td><td>2<\/td><td>2<\/td><td>3<\/td><td>2<\/td><td>2<\/td><td>2<\/td><\/tr><tr><td>2<\/td><td>3<\/td><td>2<\/td><td>2<\/td><td>3<\/td><td>3<\/td><td>2<\/td><td>1<\/td><td>4<\/td><td>2<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 2: <\/b> S\u1ed1 gia \u0111\u00ecnh \u0111\u00f4ng con (t\u1eeb $3$ con tr\u1edf l\u00ean) chi\u1ebfm bao nhi\u00eau ph\u1ea7n tr\u0103m?","select":["A. $13\\%$","B. $15\\%$","C. $\\approx 16,67\\%$","D. $\\approx 23,33\\%$"],"explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>- T\u00ednh t\u1ed5ng s\u1ed1 gia \u0111\u00ecnh \u0111\u00f4ng con (t\u1eeb $3$ con tr\u1edf l\u00ean) <br\/> - T\u00ednh t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m gi\u1eefa s\u1ed1 gia \u0111\u00ecnh \u0111\u00f4ng con v\u1edbi t\u1ed5ng s\u1ed1 gia \u0111\u00ecnh \u0111\u01b0\u1ee3c th\u1ed1ng k\u00ea. <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> T\u1eeb b\u1ea3ng ''t\u1ea7n s\u1ed1'' c\u1ee7a c\u00e2u 1, ta th\u1ea5y: <br\/> - C\u00f3 $5$ h\u1ed9 gia \u0111\u00ecnh c\u00f3 $3$ con <br\/>- C\u00f3 $2$ h\u1ed9 gia \u0111\u00ecnh c\u00f3 $4$ con <br\/> $\\Rightarrow $ T\u1ed5ng c\u00f3 $7$ h\u1ed9 gia \u0111\u00ecnh \u0111\u00f4ng con (t\u1eeb $3$ con tr\u1edf l\u00ean) <br\/> S\u1ed1 gia \u0111\u00ecnh \u0111\u00f4ng con chi\u1ebfm s\u1ed1 ph\u1ea7n tr\u0103m l\u00e0: <br\/> $\\dfrac{7}{30}\\cdot 100\\% \\approx 23,33\\%$ <br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span>","column":4}]}],"id_ques":930}],"lesson":{"save":0,"level":2}}