{"common":{"save":0,"post_id":"7063","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4967","post_id":"7063","mon_id":"1158924","chapter_id":"1159152","question":"<p>Kh\u1ea3o sát 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 ghép nhóm sau:<\/p><p><span class=\"svgedit\"><svg height=\"120\" width=\"660\"> <g><title><\/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><title><\/title><g id=\"svg_12\" stroke=\"null\"> <rect fill=\"#d4aaff\" height=\"110\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"129\" x=\"2.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"131.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"236.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"341.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"446.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"550.3\" y=\"3.85\"><\/rect> <line fill=\"none\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"1.3\" x2=\"655.29999\" y1=\"67.04148\" y2=\"67.21702\"><\/line> <\/g> <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=\"13.3\" xml:space=\"preserve\" y=\"26.85\">Th\u1eddi gian<\/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=\"34.3\" xml:space=\"preserve\" y=\"56.85\">(phút)<\/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=\"3.3\" xml:space=\"preserve\" y=\"98.85\">S\u1ed1 h\u1ecdc sinh<\/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=\"148.3\" xml:space=\"preserve\" y=\"41.85\">[0; 20)<\/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=\"246.29999\" xml:space=\"preserve\" y=\"41.85\">[20; 40)<\/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=\"354.29999\" xml:space=\"preserve\" y=\"41.85\">[40; 60)<\/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=\"458.29999\" xml:space=\"preserve\" y=\"41.85\">[60; 80)<\/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=\"556.29999\" xml:space=\"preserve\" y=\"41.85\">[80; 100)<\/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=\"176.3\" xml:space=\"preserve\" y=\"97.84999\">5<\/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=\"274.29999\" xml:space=\"preserve\" y=\"97.84999\">9<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_21\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"382.29999\" xml:space=\"preserve\" y=\"97.84999\">12<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_22\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"479.29999\" xml:space=\"preserve\" y=\"97.84999\">10<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_23\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"595.29999\" xml:space=\"preserve\" y=\"97.84999\">6<\/text> <\/g> <\/svg><\/span><\/p><p>Nhóm ch\u1ee9a trung v\u1ecb c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u trên là<\/p>","options":["<strong>A.<\/strong> [40; 60)","<strong>B.<\/strong> [20; 40)","<strong>C.<\/strong> [60; 80)","<strong>D.<\/strong> [80; 100)"],"correct":"1","level":"1","hint":"","answer":"<p>n = 5 + 9 + 12 + 10 + 6 = 42<\/p><p>Do \u0111ó trung v\u1ecb c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7 trên là <span class=\"math-tex\">$Q_2=\\dfrac{x_{21}+x_{22}}{2}$<\/span><\/p><p>Mà <span class=\"math-tex\">$x_{21};x_{22}\\in[40; 60)$<\/span><\/p><p>V\u1eady nhóm ch\u1ee9a trung v\u1ecb c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u trên là [40; 60).<\/p><p>Ch\u1ecdn <span style=\"color:#1abc9c;\"><\/span><span style=\"color:#16a085;\"><strong>A.<\/strong> [40; 60)<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-12-14 02:04:49","option_type":"txt","len":1},{"id":"4968","post_id":"7063","mon_id":"1158924","chapter_id":"1159152","question":"<p>Kh\u1ea3o sát 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 ghép nhóm sau:<\/p><p><span class=\"svgedit\"><svg height=\"120\" width=\"660\"> <g><title><\/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><title><\/title><g id=\"svg_12\" stroke=\"null\"> <rect fill=\"#d4aaff\" height=\"110\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"129\" x=\"2.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"131.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"236.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"341.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"446.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"550.3\" y=\"3.85\"><\/rect> <line fill=\"none\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"1.3\" x2=\"655.29999\" y1=\"67.04148\" y2=\"67.21702\"><\/line> <\/g> <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=\"13.3\" xml:space=\"preserve\" y=\"26.85\">Th\u1eddi gian<\/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=\"34.3\" xml:space=\"preserve\" y=\"56.85\">(phút)<\/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=\"3.3\" xml:space=\"preserve\" y=\"98.85\">S\u1ed1 h\u1ecdc sinh<\/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=\"148.3\" xml:space=\"preserve\" y=\"41.85\">[0; 20)<\/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=\"246.29999\" xml:space=\"preserve\" y=\"41.85\">[20; 40)<\/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=\"354.29999\" xml:space=\"preserve\" y=\"41.85\">[40; 60)<\/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=\"458.29999\" xml:space=\"preserve\" y=\"41.85\">[60; 80)<\/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=\"556.29999\" xml:space=\"preserve\" y=\"41.85\">[80; 100)<\/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=\"176.3\" xml:space=\"preserve\" y=\"97.84999\">5<\/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=\"274.29999\" xml:space=\"preserve\" y=\"97.84999\">9<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_21\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"382.29999\" xml:space=\"preserve\" y=\"97.84999\">12<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_22\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"479.29999\" xml:space=\"preserve\" y=\"97.84999\">10<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_23\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"595.29999\" xml:space=\"preserve\" y=\"97.84999\">6<\/text> <\/g> <\/svg><\/span><\/p><p>Nhóm ch\u1ee9a t\u1ee9 phân v\u1ecb th\u1ee9 nh\u1ea5t c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u trên là<\/p>","options":["<strong>A.<\/strong> [60; 80)","<strong>B.<\/strong> [20; 40)","<strong>C.<\/strong> [0; 20)","<strong>D.<\/strong> [40; 60)"],"correct":"2","level":"1","hint":"","answer":"<p>Ta có: n = 42<\/p><p>Nên t\u1ee9 phân v\u1ecb th\u1ee9 nh\u1ea5t c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u trên là <span class=\"math-tex\">$Q_1=x_{11}$<\/span><\/p><p>Mà <span class=\"math-tex\">$x_{11}\\in[20;40)$<\/span><\/p><p>V\u1eady nhóm ch\u1ee9a t\u1ee9 phân v\u1ecb th\u1ee9 nh\u1ea5t c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u trên là [20; 40)<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> [20; 40)<\/span><\/p>","type":"choose","extra_type":"shape2","user_id":"131","test":"0","date":"2023-12-14 02:09:18","option_type":"txt","len":0},{"id":"4970","post_id":"7063","mon_id":"1158924","chapter_id":"1159152","question":"<p>Kh\u1ea3o sát 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 ghép nhóm sau:<\/p><p><span class=\"svgedit\"><svg height=\"120\" width=\"660\"> <g><title><\/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><title><\/title><g id=\"svg_12\" stroke=\"null\"> <rect fill=\"#d4aaff\" height=\"110\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"129\" x=\"2.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"131.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"236.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"341.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"446.3\" y=\"3.85\"><\/rect> <rect fill=\"#fff\" height=\"110\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"1.5\" width=\"105\" x=\"550.3\" y=\"3.85\"><\/rect> <line fill=\"none\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"1.3\" x2=\"655.29999\" y1=\"67.04148\" y2=\"67.21702\"><\/line> <\/g> <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=\"13.3\" xml:space=\"preserve\" y=\"26.85\">Th\u1eddi gian<\/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=\"34.3\" xml:space=\"preserve\" y=\"56.85\">(phút)<\/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=\"3.3\" xml:space=\"preserve\" y=\"98.85\">S\u1ed1 h\u1ecdc sinh<\/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=\"148.3\" xml:space=\"preserve\" y=\"41.85\">[0; 20)<\/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=\"246.29999\" xml:space=\"preserve\" y=\"41.85\">[20; 40)<\/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=\"354.29999\" xml:space=\"preserve\" y=\"41.85\">[40; 60)<\/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=\"458.29999\" xml:space=\"preserve\" y=\"41.85\">[60; 80)<\/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=\"556.29999\" xml:space=\"preserve\" y=\"41.85\">[80; 100)<\/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=\"176.3\" xml:space=\"preserve\" y=\"97.84999\">5<\/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=\"274.29999\" xml:space=\"preserve\" y=\"97.84999\">9<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_21\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"382.29999\" xml:space=\"preserve\" y=\"97.84999\">12<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_22\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"479.29999\" xml:space=\"preserve\" y=\"97.84999\">10<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_23\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"595.29999\" xml:space=\"preserve\" y=\"97.84999\">6<\/text> <\/g> <\/svg><\/span><\/p><p>Nhóm ch\u1ee9a t\u1ee9 phân v\u1ecb th\u1ee9 ba c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u trên là<\/p>","options":["<strong>A.<\/strong> [40; 60)","<strong>B.<\/strong> [20; 40)","<strong>C.<\/strong> [60; 80)","<strong>D.<\/strong> [80; 100)"],"correct":"3","level":"1","hint":"","answer":"<p>Ta có: n = 42<\/p><p>Nên t\u1ee9 phân v\u1ecb th\u1ee9 ba c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u trên là <span class=\"math-tex\">$Q_3=x_{33}$<\/span><\/p><p>Mà <span class=\"math-tex\">$x_{33}$<\/span> ∈ [60; 80)<\/p><p>V\u1eady nhóm ch\u1ee9a t\u1ee9 phân v\u1ecb th\u1ee9 ba c\u1ee7a m\u1eabu s\u1ed1 li\u1ec7u trên là [60; 80)<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> [60; 80)<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-12-14 02:09:52","option_type":"txt","len":1}]}