ÔN TẬP: CÁC SỐ ĐẶC TRƯNG ĐO MỨC ĐỘ PHÂN TÁN CỦA MẪU SỐ LIỆU GHÉP NHÓM (nâng cao 2)

Home Lớp 12 Toán lớp 12 - Sách Kết nối tri thức Bài tập cuối chương 3. CÁC SỐ ĐẶC TRƯNG ĐO MỨC ĐỘ PHÂN TÁN CỦA MẪU SỐ LIỆU GHÉP NHÓM.Bài tập nâng cao

{"common":{"save":0,"post_id":"7857","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5873","post_id":"7857","mon_id":"1159285","chapter_id":"1159394","question":"M\u1ed9t bác tài x\u1ebf th\u1ed1ng kê l\u1ea1i \u0111\u1ed9 dài quãng \u0111\u01b0\u1eddng (\u0111\u01a1n v\u1ecb: km) bác \u0111ã lái xe m\u1ed7i ngày trong m\u1ed9t tháng \u1edf b\u1ea3ng sau:<\/p><svg height=\"220\" width=\"260\"> <g><title><\/title><rect fill=\"#fff\" height=\"222\" id=\"canvas_background\" width=\"262\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_18\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><rect fill=\"#aaffd4\" height=\"62\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"252.99999\" x=\"3.31818\" y=\"2.43181\"><\/rect> <rect fill=\"#ffffaa\" height=\"153\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\" width=\"252.99999\" x=\"3.31818\" y=\"63.43181\"><\/rect> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"179.31817\" x2=\"179\" y1=\"2.43181\" y2=\"216.4318\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" font-weight=\"bold\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"205.31817\" xml:space=\"preserve\" y=\"25.43181\">S\u1ed1<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" font-weight=\"bold\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"195.31817\" xml:space=\"preserve\" y=\"52.43181\">ngày<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" font-weight=\"bold\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"22.31817\" xml:space=\"preserve\" y=\"25.43181\">\u0110\u1ed9 dài quãng<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" font-weight=\"bold\" id=\"svg_7\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"24.31817\" xml:space=\"preserve\" y=\"52.43181\">\u0111\u01b0\u1eddng (km)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"46.31817\" xml:space=\"preserve\" y=\"85.43181\">[50; 100)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"46.31817\" xml:space=\"preserve\" y=\"115\">[100; 150)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"46.31817\" xml:space=\"preserve\" y=\"145\">[150; 200)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"46.31817\" xml:space=\"preserve\" y=\"175\">[200; 250)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_12\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"46.31817\" xml:space=\"preserve\" y=\"205\">[250; 300)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_13\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"210.31817\" xml:space=\"preserve\" y=\"85.43181\">5<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_14\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"204.31817\" xml:space=\"preserve\" y=\"115\">10<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"210.31817\" xml:space=\"preserve\" y=\"145\">9<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_16\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"210.31817\" xml:space=\"preserve\" y=\"175\">4<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_17\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"210.31817\" xml:space=\"preserve\" y=\"205\">2<\/text> <\/g> <\/svg><\/span><\/p>Kho\u1ea3ng t\u1ee9 phân v\u1ecb c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u trên là:<\/p>","options":["A.<\/strong> 81,02","B.<\/strong> 80,02","C.<\/strong> 79,17","D.<\/strong> 80,03"],"correct":"3","level":"3","hint":"S\u1eed d\u1ee5ng công th\u1ee9c tính kho\u1ea3ng t\u1ee9 phân v\u1ecb.<\/p>","answer":"Ch\u1ecdn C.<\/strong> 79,17<\/span><\/p>C\u1ee1 m\u1eabu: n = 30.<\/p>G\u1ecdi $x_1;x_2;x_3; . . .;x_{30}$<\/span> là m\u1eabu s\u1ed1 li\u1ec7u g\u1ed1c v\u1ec1 \u0111\u1ed9 dài quãng \u0111\u01b0\u1eddng bác tài x\u1ebf lái m\u1ed7i ngày trong m\u1ed9t tháng \u0111\u01b0\u1ee3c x\u1ebfp theo th\u1ee9 t\u1ef1 không gi\u1ea3m.<\/p>Ta có: $x_1; . . . ;x_5\\in [50;100)$<\/span>, $x_6; . . .;x_{15}\\in [100;150)$<\/span>, $x_{16}; . . .;x_{24}\\in [150;200)$<\/span>, $x_{25}; . . .;x_{28}\\in [200;250)$<\/span>, $x_{29}; x_{30}\\in [250;300)$<\/span>.<\/p>T\u1ee9 phân v\u1ecb th\u1ee9 nh\u1ea5t c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u g\u1ed1c là $x_8 \\in [100;150)$<\/span>. Do \u0111ó, t\u1ee9 phân v\u1ecb th\u1ee9 nh\u1ea5t c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u ghép nhóm là:<\/p>$Q_1=100+\\dfrac{30:4-5}{10}.50=112,5$<\/span><\/p>T\u1ee9 phân v\u1ecb th\u1ee9 ba c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u g\u1ed1c là $x_{23}\\in [150;200)$<\/span>. Do \u0111ó, t\u1ee9 phân v\u1ecb th\u1ee9 ba c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u ghép nhóm là:<\/p>$Q_3=150+\\dfrac{3.30:4-(5+10)}{9}.50=\\dfrac{575}{3}$<\/span><\/p>Kho\u1ea3ng t\u1ee9 phân v\u1ecb c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u ghép nhóm là: $Q_3-Q_1=\\dfrac{575}{3}-112,5\\approx 79,17$<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-10-20 08:24:46","option_type":"txt","len":0},{"id":"5875","post_id":"7857","mon_id":"1159285","chapter_id":"1159394","question":"B\u1ea3ng sau bi\u1ec3u di\u1ec5n m\u1eabu s\u1ed1 li\u1ec7u ghép nhóm th\u1ed1ng kê m\u1ee9c l\u01b0\u01a1ng c\u1ee7a m\u1ed9t công ty (\u0111\u01a1n v\u1ecb: tri\u1ec7u \u0111\u1ed3ng).<\/p><svg height=\"260\" width=\"210\"> <g> <title><\/title> <rect fill=\"#fff\" height=\"262\" id=\"canvas_background\" width=\"212\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_7\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <rect fill=\"#aaffaa\" height=\"41\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"200\" x=\"4.31818\" y=\"1.43181\"><\/rect> <rect fill=\"#ffffff\" height=\"214.99999\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\" width=\"200\" x=\"4.31818\" y=\"42.43181\"><\/rect> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"113.31817\" x2=\"113.31817\" y1=\"0.43181\" y2=\"258.43182\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"116.31817\" xml:space=\"preserve\" y=\"28.43181\">T\u1ea7n s\u1ed1<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"20.31818\" xml:space=\"preserve\" y=\"30.43181\">Nhóm<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"65.43181\">[10; 15)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"95\">[15; 20)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"125\">[20; 25)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"155\">[25; 30)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"185\">[30; 35)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_12\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"215\">[35; 40)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_13\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31817\" xml:space=\"preserve\" y=\"65.43181\">15<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_14\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31817\" xml:space=\"preserve\" y=\"95\">18<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31817\" xml:space=\"preserve\" y=\"125\">10<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_16\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31817\" xml:space=\"preserve\" y=\"155\">10<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_17\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"145.31817\" xml:space=\"preserve\" y=\"185\">5<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_18\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"145.31817\" xml:space=\"preserve\" y=\"215\">2<\/text> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_19\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"3.31817\" x2=\"204.31817\" y1=\"226\" y2=\"226\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-style=\"italic\" id=\"svg_20\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"124.31817\" xml:space=\"preserve\" y=\"249.4318\">n = 60<\/text> <\/g> <\/svg><\/span><\/p>Kho\u1ea3ng bi\u1ebfn thiên c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u ghép nhóm trên là:<\/p>","options":["A.<\/strong> 30","B.<\/strong> 40","C.<\/strong> 50","D.<\/strong> 60"],"correct":"1","level":"3","hint":"S\u1eed d\u1ee5ng công th\u1ee9c tính kho\u1ea3ng bi\u1ebfn thiên<\/p>","answer":"Ch\u1ecdn <\/span>A.<\/strong> 30<\/span><\/p>Kho\u1ea3ng bi\u1ebfn thiên c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u ghép nhóm trên là: R = 40 – 10 = 30.<\/p>","type":"choose","extra_type":"shape2","user_id":"131","test":"0","date":"2024-10-20 08:32:52","option_type":"txt","len":0},{"id":"5876","post_id":"7857","mon_id":"1159285","chapter_id":"1159394","question":"B\u1ea3ng sau bi\u1ec3u di\u1ec5n m\u1eabu s\u1ed1 li\u1ec7u ghép nhóm th\u1ed1ng kê m\u1ee9c l\u01b0\u01a1ng c\u1ee7a m\u1ed9t công ty (\u0111\u01a1n v\u1ecb: tri\u1ec7u \u0111\u1ed3ng).<\/p><svg height=\"260\" width=\"210\"> <g> <title><\/title> <rect fill=\"#fff\" height=\"262\" id=\"canvas_background\" width=\"212\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_7\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <rect fill=\"#aaffaa\" height=\"41\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"200\" x=\"4.31818\" y=\"1.43181\"><\/rect> <rect fill=\"#ffffff\" height=\"214.99999\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\" width=\"200\" x=\"4.31818\" y=\"42.43181\"><\/rect> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"113.31817\" x2=\"113.31817\" y1=\"0.43181\" y2=\"258.43182\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"116.31817\" xml:space=\"preserve\" y=\"28.43181\">T\u1ea7n s\u1ed1<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"20.31818\" xml:space=\"preserve\" y=\"30.43181\">Nhóm<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"65.43181\">[10; 15)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"95\">[15; 20)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"125\">[20; 25)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"155\">[25; 30)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"185\">[30; 35)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_12\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"17\" xml:space=\"preserve\" y=\"215\">[35; 40)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_13\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31817\" xml:space=\"preserve\" y=\"65.43181\">15<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_14\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31817\" xml:space=\"preserve\" y=\"95\">18<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31817\" xml:space=\"preserve\" y=\"125\">10<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_16\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31817\" xml:space=\"preserve\" y=\"155\">10<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_17\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"145.31817\" xml:space=\"preserve\" y=\"185\">5<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_18\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"145.31817\" xml:space=\"preserve\" y=\"215\">2<\/text> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_19\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"3.31817\" x2=\"204.31817\" y1=\"226\" y2=\"226\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-style=\"italic\" id=\"svg_20\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"124.31817\" xml:space=\"preserve\" y=\"249.4318\">n = 60<\/text> <\/g> <\/svg><\/span><\/p>S\u1ed1 ph\u1ea7n t\u1eed c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u ghép nhóm trên là:<\/p>","options":["A.<\/strong> 50","B.<\/strong> 60","C.<\/strong> 70","D.<\/strong> 80"],"correct":"2","level":"3","hint":"S\u1eed d\u1ee5ng \u0111\u1ecbnh ngh\u0129a s\u1ed1 ph\u1ea7n t\u1eed c\u1ee7a nhóm.<\/p>","answer":"Ch\u1ecdn B.<\/strong> 60<\/span><\/p>S\u1ed1 ph\u1ea7n t\u1eed c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u trên là n = 60.<\/p>","type":"choose","extra_type":"shape1","user_id":"131","test":"0","date":"2024-10-20 08:33:53","option_type":"txt","len":0}]}