{"common":{"save":0,"post_id":"7065","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5006","post_id":"7065","mon_id":"1158924","chapter_id":"1159152","question":"<p>Kh\u1ea3o s&aacute;t th\u1eddi gian t\u1eadp th\u1ec3 d\u1ee5c c\u1ee7a m\u1ed9t s\u1ed1 h\u1ecdc sinh kh\u1ed1i 11 thu \u0111\u01b0\u1ee3c m\u1eabu s\u1ed1 li\u1ec7u gh&eacute;p nh&oacute;m sau:<\/p><p><span class=\"svgedit\"><svg height=\"120\" width=\"660\"> <g>&lt;title&gt;&lt;\/title><rect fill=\"#fff\" height=\"122\" id=\"canvas_background\" width=\"662\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>&lt;title&gt;&lt;\/title><rect fill=\"#aad4ff\" height=\"110\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"131\" x=\"1.9\" y=\"4.65\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\" width=\"104\" x=\"132.9\" y=\"4.65\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"1.5\" width=\"104\" x=\"236.9\" y=\"4.65\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"1.5\" width=\"104\" x=\"340.9\" y=\"4.65\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"1.5\" width=\"104\" x=\"444.9\" y=\"4.65\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"1.5\" width=\"104\" x=\"548.9\" y=\"4.65\"><\/rect> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"0.9\" x2=\"653.89999\" y1=\"69.65\" y2=\"69.65\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"11.9\" xml:space=\"preserve\" y=\"30.65\">Th\u1eddi gian<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"31.9\" xml:space=\"preserve\" y=\"60.65\">(ph&uacute;t)<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.8903896487667672,0,0,1.1737653017044067,1.3809689520973956,-11.988822130364497) \" x=\"5.0231\" xml:space=\"preserve\" y=\"95.50196\">S\u1ed1 h\u1ecdc sinh<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"156.9\" xml:space=\"preserve\" y=\"44.65\">[0; 20)<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_12\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"250.89999\" xml:space=\"preserve\" y=\"44.65\">[20; 40)<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_13\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"349.89999\" xml:space=\"preserve\" y=\"44.65\">[40; 60)<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_14\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"457.89999\" xml:space=\"preserve\" y=\"44.65\">[60; 80)<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"554.89999\" xml:space=\"preserve\" y=\"44.65\">[80; 100)<\/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=\"175.89999\" xml:space=\"preserve\" y=\"97.65\">5<\/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=\"280.89999\" xml:space=\"preserve\" y=\"97.65\">9<\/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=\"376.89999\" xml:space=\"preserve\" y=\"97.65\">12<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_19\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"482.89999\" xml:space=\"preserve\" y=\"97.65\">10<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_20\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"591.89999\" xml:space=\"preserve\" y=\"97.65\">6<\/text> <\/g> <\/svg><\/span><\/p><p>T&igrave;m th\u1eddi gian t\u1eadp th\u1ec3 d\u1ee5c trung b&igrave;nh c\u1ee7a c&aacute;c h\u1ecdc sinh kh\u1ed1i 11 tr&ecirc;n.<\/p>","options":["<strong>A.<\/strong> 54,13","<strong>B.<\/strong> 50,43","<strong>C.<\/strong> 53,14","<strong>D.<\/strong> 51,43"],"correct":"4","level":"3","hint":"","answer":"<p>Gi&aacute; tr\u1ecb \u0111\u1ea1i di\u1ec7n c\u1ee7a t\u1eebng nh&oacute;m c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u tr&ecirc;n l\u1ea7n l\u01b0\u1ee3t l&agrave;:<\/p><p>10; 30; 50; 70; 90<\/p><p>T\u1ed5ng s\u1ed1 h\u1ecdc sinh trong m\u1eabu s\u1ed1 li\u1ec7u tr&ecirc;n l&agrave; n = 42<\/p><p>Do \u0111&oacute; th\u1eddi gian t\u1eadp th\u1ec3 d\u1ee5c trung b&igrave;nh l&agrave;:<\/p><p><span class=\"math-tex\">$\\overline{x}=\\dfrac{5.10+9.30+12.50+10.70+6.90}{42}$<\/span>&nbsp;&asymp; 51,43 (ph&uacute;t)<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong>&nbsp;51,43<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-12-20 02:56:47","option_type":"txt","len":0},{"id":"5008","post_id":"7065","mon_id":"1158924","chapter_id":"1159152","question":"<p>Cho m\u1eabu s\u1ed1 li\u1ec7u gh&eacute;p nh&oacute;m v\u1ec1 th\u1ed1ng k&ecirc; th\u1eddi gian ho&agrave;n th&agrave;nh m\u1ed9t b&agrave;i ki\u1ec3m tra tr\u1ef1c tuy\u1ebfn c\u1ee7a 100 h\u1ecdc&nbsp;sinh, ta c&oacute; b\u1ea3ng s\u1ed1 li\u1ec7u sau:&nbsp;<\/p><p><span class=\"svgedit\"><svg height=\"120\" width=\"650\"> <g>&lt;title&gt;&lt;\/title><rect fill=\"#fff\" height=\"122\" id=\"canvas_background\" width=\"652\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>&lt;title&gt;&lt;\/title><rect fill=\"#ffaa56\" height=\"112.99999\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"112\" x=\"4\" y=\"3.06818\"><\/rect> <g id=\"svg_13\" stroke=\"null\"> <g id=\"svg_8\" stroke=\"null\"> <rect fill=\"#fff\" height=\"112.99999\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\" width=\"88.16667\" x=\"116\" y=\"3.06818\"><\/rect> <rect fill=\"#fff\" height=\"112.99999\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"1.5\" width=\"88.16667\" x=\"204.16667\" y=\"3.06818\"><\/rect> <rect fill=\"#fff\" height=\"112.99999\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"1.5\" width=\"88.16667\" x=\"292.33334\" y=\"3.06818\"><\/rect> <\/g> <g id=\"svg_12\" stroke=\"null\"> <rect fill=\"#fff\" height=\"112.99999\" id=\"svg_9\" stroke=\"#000\" stroke-width=\"1.5\" width=\"88.16667\" x=\"380.50001\" y=\"3.06818\"><\/rect> <rect fill=\"#fff\" height=\"112.99999\" id=\"svg_10\" stroke=\"#000\" stroke-width=\"1.5\" width=\"88.16667\" x=\"468.66668\" y=\"3.06818\"><\/rect> <rect fill=\"#fff\" height=\"112.99999\" id=\"svg_11\" stroke=\"#000\" stroke-width=\"1.5\" width=\"88.16667\" x=\"556.83335\" y=\"3.06818\"><\/rect> <\/g> <\/g> <line fill=\"none\" id=\"svg_14\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"4\" x2=\"644.99998\" y1=\"69.06817\" y2=\"69\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"5\" xml:space=\"preserve\" y=\"26.06817\">Th\u1eddi gian<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-style=\"normal\" font-weight=\"bold\" id=\"svg_16\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"18\" xml:space=\"preserve\" y=\"57.06817\">(ph&uacute;t)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_17\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.7646974921226501,0,0,1,1.4118148228621408,0) \" x=\"6\" xml:space=\"preserve\" y=\"100.06817\">S\u1ed1 h\u1ecdc sinh<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_18\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"121\" xml:space=\"preserve\" y=\"39.06817\">[33; 35)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_19\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"209.99999\" xml:space=\"preserve\" y=\"39.06817\">[35; 37)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_20\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"297.99999\" xml:space=\"preserve\" y=\"39.06817\">[37; 39)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_21\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"386.99999\" xml:space=\"preserve\" y=\"39.06817\">[39; 41)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_22\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"474.99999\" xml:space=\"preserve\" y=\"39.06817\">[41; 43)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"22\" id=\"svg_23\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"564.99998\" xml:space=\"preserve\" y=\"39.06817\">[43; 45)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_24\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"154\" xml:space=\"preserve\" y=\"100.06817\">4<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_25\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"237.99999\" xml:space=\"preserve\" y=\"100.06817\">13<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_26\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"322.99999\" xml:space=\"preserve\" y=\"100.06817\">38<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_27\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"413.99999\" xml:space=\"preserve\" y=\"100.06817\">27<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_28\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"500.99998\" xml:space=\"preserve\" y=\"100.06817\">14<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_29\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"590.99998\" xml:space=\"preserve\" y=\"100.06817\">4<\/text> <\/g> <\/svg><\/span><\/p><p>T&iacute;nh m\u1ed1t c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u tr&ecirc;n&nbsp;(k\u1ebft qu\u1ea3 l&agrave;m tr&ograve;n \u0111\u1ebfn h&agrave;ng ph\u1ea7n tr\u0103m).<\/p>","options":["<strong>A.<\/strong> 38,93","<strong>B.<\/strong> 38,39","<strong>C.<\/strong> 39,28","<strong>D.<\/strong> 39,82"],"correct":"2","level":"3","hint":"","answer":"<p>T\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t l&agrave; 38 n&ecirc;n c&oacute; nh&oacute;m ch\u1ee9a m\u1ed1t&nbsp;l&agrave; nh&oacute;m [37; 39).<\/p><p>Ta&nbsp;c&oacute;:&nbsp;j = 3;&nbsp;<span class=\"math-tex\">$a_3=37$<\/span>,&nbsp;<span class=\"math-tex\">$m_3=38$<\/span>,&nbsp;<span class=\"math-tex\">$m_2=13$<\/span>,&nbsp;<span class=\"math-tex\">$m_4=27$<\/span><\/p><p>Do \u0111&oacute;:&nbsp;<span class=\"math-tex\">$M_0=37+\\dfrac{38-13}{(38-13)+(38-27)}.2\\approx 38,39$<\/span><\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong>&nbsp;38,39<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-12-20 03:03:28","option_type":"txt","len":0},{"id":"5009","post_id":"7065","mon_id":"1158924","chapter_id":"1159152","question":"<p>Cho m\u1eabu s\u1ed1 li\u1ec7u gh&eacute;p nh&oacute;m v\u1ec1 th\u1ed1ng k&ecirc; chi\u1ec1u cao c\u1ee7a 35 c&acirc;y b\u1ea1ch \u0111&agrave;n trong r\u1eebng, ta c&oacute; b\u1ea3ng s\u1ed1 li\u1ec7u&nbsp;sau:<\/p><p><span class=\"svgedit\"><svg height=\"120\" width=\"620\"> <g>&lt;title&gt;&lt;\/title><rect fill=\"#fff\" height=\"122\" id=\"canvas_background\" width=\"622\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>&lt;title&gt;&lt;\/title><rect fill=\"#56ffff\" height=\"117\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"135\" x=\"4\" y=\"1.06817\"><\/rect> <rect fill=\"#fff\" height=\"117\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\" width=\"118.99999\" x=\"139\" y=\"1.06817\"><\/rect> <rect fill=\"#fff\" height=\"117\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"1.5\" width=\"118.99999\" x=\"258\" y=\"1.06817\"><\/rect> <rect fill=\"#fff\" height=\"117\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"1.5\" width=\"118.99999\" x=\"377\" y=\"1.06817\"><\/rect> <rect fill=\"#fff\" height=\"117\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"1.5\" width=\"118.99999\" x=\"496\" y=\"1.06817\"><\/rect> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"4\" x2=\"613.99998\" y1=\"69.06817\" y2=\"69\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.798283040523529,0,0,1,1.2103014683004005,0) \" x=\"6\" xml:space=\"preserve\" y=\"26.06817\">Kho\u1ea3ng chi\u1ec1u<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.7935404670047319,0,0,1.0306038856506348,5.844701674120167,-1.9823861193144694) \" x=\"32.71893\" xml:space=\"preserve\" y=\"57.06817\">cao (m)<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"25\" xml:space=\"preserve\" y=\"101.06817\">S\u1ed1 c&acirc;y<\/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=\"148.99999\" xml:space=\"preserve\" y=\"39.06817\">[6,5; 7,0)<\/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=\"270.99999\" xml:space=\"preserve\" y=\"39.06817\">[7,0; 7,5)<\/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=\"393.99999\" xml:space=\"preserve\" y=\"39.06817\">[7,5; 8,0)<\/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=\"510.99998\" xml:space=\"preserve\" y=\"39.06817\">[8,0; 8,5)<\/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=\"185.99999\" xml:space=\"preserve\" y=\"100.06817\">6<\/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=\"300.99999\" xml:space=\"preserve\" y=\"100.06817\">15<\/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=\"422.99999\" xml:space=\"preserve\" y=\"100.06817\">11<\/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=\"549.99998\" xml:space=\"preserve\" y=\"100.06817\">3<\/text> <\/g> <\/svg><\/span><\/p><p>M\u1ed1t c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u gh&eacute;p nh&oacute;m tr&ecirc;n l&agrave;&nbsp;(k\u1ebft qu\u1ea3 l&agrave;m tr&ograve;n \u0111\u1ebfn h&agrave;ng ph\u1ea7n tr\u0103m):<\/p>","options":["<strong>A.<\/strong> 7,35","<strong>B.<\/strong> 7,34","<strong>C.<\/strong> 3,75","<strong>D.<\/strong> 7,43"],"correct":"1","level":"3","hint":"","answer":"<p>T\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t l&agrave; 15 n&ecirc;n c&oacute; nh&oacute;m ch\u1ee9a m\u1ed1t&nbsp;l&agrave; nh&oacute;m [7,0; 7,5).<\/p><p>Ta&nbsp;c&oacute;:&nbsp;j = 2;&nbsp;<span class=\"math-tex\">$a_2=7,0$<\/span>,&nbsp;<span class=\"math-tex\">$m_2=15$<\/span>,&nbsp;<span class=\"math-tex\">$m_1=6$<\/span>,&nbsp;<span class=\"math-tex\">$m_3=11$<\/span><\/p><p>Do \u0111&oacute;:&nbsp;<span class=\"math-tex\">$M_0=7,0+\\dfrac{15-6}{(15-6)+(15-11)}.0,5\\approx 7,35$<\/span><\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong>&nbsp;7,35<\/span><\/p>","type":"choose","extra_type":"shape1","user_id":"131","test":"0","date":"2023-12-20 03:06:47","option_type":"txt","len":0}]}