Mối liên hệ giữa xác suất thực nghiệm với xác suất và ứng dụng

Home Lớp 8 Toán lớp 8 - Sách Kết nối tri thức Bài 32. Mối liên hệ giữa xác suất thực nghiệm với xác suất và ứng dụngBài tập trung bình

{"common":{"save":0,"post_id":"6673","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6825","post_id":"6673","mon_id":"1158921","chapter_id":"1158935","question":"Th\u1ed1ng kê \u0111i\u1ec3m ki\u1ec3m tra môn toán cu\u1ed1i n\u0103m c\u1ee7a m\u1ed9t nhóm 150 h\u1ecdc sinh l\u1edbp 8 \u0111\u01b0\u1ee3c ch\u1ecdn ng\u1eabu nhiên t\u1ea1i 4 l\u1edbp c\u1ee7a tr\u01b0\u1eddng X thu \u0111\u01b0\u1ee3c trong b\u1ea3ng sau:<\/p><svg height=\"300\" width=\"220\"> <g><title><\/title><rect fill=\"#fff\" height=\"302\" id=\"canvas_background\" width=\"222\" 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_37\"> <rect fill=\"#fff\" height=\"290.11072\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"214.00001\" x=\"2.31534\" 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text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"61.31535\" xml:space=\"preserve\" y=\"143.89632\">4<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_19\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"60.31535\" xml:space=\"preserve\" y=\"174.89632\">5<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_20\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"59.31535\" xml:space=\"preserve\" y=\"201.89632\">6<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_21\" stroke=\"#000\" stroke-opacity=\"null\" 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stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"136.31535\" xml:space=\"preserve\" y=\"100.52273\">16<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_30\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"135.31535\" xml:space=\"preserve\" y=\"127.52273\">16<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_31\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"137.31535\" xml:space=\"preserve\" y=\"234.52273\">14<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_32\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"136.31535\" xml:space=\"preserve\" y=\"155.52273\">17<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_33\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"135.31535\" xml:space=\"preserve\" y=\"179.52273\">17<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_34\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"137.31535\" xml:space=\"preserve\" y=\"207.52273\">18<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_35\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"138.31535\" xml:space=\"preserve\" y=\"260.52273\">13<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_36\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31535\" xml:space=\"preserve\" y=\"288.52273\">13<\/text> <\/g> <\/g> <\/svg><\/span><\/p>Ch\u1ecdn ng\u1eabu nhiên m\u1ed9t h\u1ecdc sinh l\u1edbp 8 c\u1ee7a tr\u01b0\u1eddng X, tính xác su\u1ea5t th\u1ef1c nghi\u1ec7m c\u1ee7a bi\u1ebfn c\u1ed1 E: "H\u1ecdc sinh \u0111ó có \u0111i\u1ec3m không nh\u1ecf h\u01a1n 8".<\/p>","options":["A.<\/strong> $\\dfrac{4}{15}$<\/span>","B.<\/strong> $\\dfrac{13}{75}$<\/span>","C.<\/strong> $\\dfrac{4}{25}$<\/span>","D.<\/strong> $\\dfrac{14}{15}$<\/span>"],"correct":"1","level":"2","hint":"","answer":"Trong 150 h\u1ecdc sinh l\u1edbp 8 \u0111\u01b0\u1ee3c ch\u1ecdn ng\u1eabu nhiên có s\u1ed1 h\u1ecdc sinh có \u0111i\u1ec3m không nh\u1ecf h\u01a1n 8 là:<\/p>14 + 13 + 13 = 40 (h\u1ecdc sinh)<\/p>Xác su\u1ea5t th\u1ef1c nghi\u1ec7m c\u1ee7a bi\u1ebfn c\u1ed1 E: "H\u1ecdc sinh \u0111ó có \u0111i\u1ec3m không nh\u1ecf h\u01a1n 8" là:<\/p>$\\dfrac{40}{150}=$<\/span> $\\dfrac{4}{15}$<\/span><\/p>Ch\u1ecdn A.<\/strong> $\\dfrac{4}{15}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-09-03 07:00:34","option_type":"math","len":0},{"id":"6828","post_id":"6673","mon_id":"1158921","chapter_id":"1158935","question":"Th\u1ed1ng kê \u0111i\u1ec3m ki\u1ec3m tra môn toán cu\u1ed1i n\u0103m c\u1ee7a m\u1ed9t nhóm 150 h\u1ecdc sinh l\u1edbp 8 \u0111\u01b0\u1ee3c ch\u1ecdn ng\u1eabu nhiên t\u1ea1i 4 l\u1edbp c\u1ee7a tr\u01b0\u1eddng X thu \u0111\u01b0\u1ee3c trong b\u1ea3ng sau:<\/p><svg height=\"300\" width=\"220\"> <g><title><\/title><rect fill=\"#fff\" height=\"302\" id=\"canvas_background\" width=\"222\" 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_37\"> <rect fill=\"#fff\" height=\"290.11072\" 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stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"108.45561\" y2=\"108.88003\"><\/line> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"135.13346\" y2=\"135.55788\"><\/line> <line fill=\"none\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"160.92205\" y2=\"161.34647\"><\/line> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"187.59991\" y2=\"188.02432\"><\/line> <line fill=\"none\" id=\"svg_10\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"214.27776\" y2=\"214.70218\"><\/line> <line fill=\"none\" id=\"svg_11\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"241.84487\" y2=\"242.26929\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_12\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"39.31535\" xml:space=\"preserve\" y=\"24.89631\">S\u1ed1 \u0111i\u1ec3m<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_13\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"124.31535\" xml:space=\"preserve\" y=\"24.89631\">S\u1ed1 h\u1ecdc sinh<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_15\" 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font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_29\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"136.31535\" xml:space=\"preserve\" y=\"100.52273\">16<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_30\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"135.31535\" xml:space=\"preserve\" y=\"127.52273\">16<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_31\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"137.31535\" xml:space=\"preserve\" y=\"234.52273\">14<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_32\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"136.31535\" xml:space=\"preserve\" y=\"155.52273\">17<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_33\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"135.31535\" xml:space=\"preserve\" y=\"179.52273\">17<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_34\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"137.31535\" xml:space=\"preserve\" y=\"207.52273\">18<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_35\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"138.31535\" xml:space=\"preserve\" y=\"260.52273\">13<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_36\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31535\" xml:space=\"preserve\" y=\"288.52273\">13<\/text> <\/g> <\/g> <\/svg><\/span><\/p>Ch\u1ecdn ng\u1eabu nhiên m\u1ed9t h\u1ecdc sinh l\u1edbp 8 c\u1ee7a tr\u01b0\u1eddng X, \u01b0\u1edbc l\u01b0\u1ee3ng xác su\u1ea5t c\u1ee7a bi\u1ebfn c\u1ed1 E: "H\u1ecdc sinh \u0111ó có \u0111i\u1ec3m t\u1eeb 5 \u0111\u1ebfn 8".<\/p>","options":["A.<\/strong> $\\dfrac{12}{25}$<\/span>","B.<\/strong> $\\dfrac{11}{15}$<\/span>","C.<\/strong> $\\dfrac{11}{25}$<\/span>","D.<\/strong> $\\dfrac{26}{75}$<\/span>"],"correct":"3","level":"2","hint":"","answer":"Trong 150 h\u1ecdc sinh l\u1edbp 8 \u0111\u01b0\u1ee3c ch\u1ecdn ng\u1eabu nhiên có s\u1ed1 h\u1ecdc sinh có \u0111i\u1ec3m t\u1eeb 5 \u0111\u1ebfn 8 là:<\/p>17 + 17 + 18 + 14 = 66 (h\u1ecdc sinh)<\/p>Xác su\u1ea5t c\u1ee7a bi\u1ebfn c\u1ed1 E: "H\u1ecdc sinh \u0111ó có \u0111i\u1ec3m t\u1eeb 5 \u0111\u1ebfn 8" \u0111\u01b0\u1ee3c \u01b0\u1edbc l\u01b0\u1ee3ng là:<\/p>$\\dfrac{66}{150}=$<\/span> $\\dfrac{11}{25}$<\/span><\/p>Ch\u1ecdn C.<\/strong> $\\dfrac{11}{25}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-09-03 07:04:49","option_type":"math","len":0},{"id":"6830","post_id":"6673","mon_id":"1158921","chapter_id":"1158935","question":"Th\u1ed1ng kê \u0111i\u1ec3m ki\u1ec3m tra môn toán cu\u1ed1i n\u0103m c\u1ee7a m\u1ed9t nhóm 150 h\u1ecdc sinh l\u1edbp 8 \u0111\u01b0\u1ee3c ch\u1ecdn ng\u1eabu nhiên t\u1ea1i 4 l\u1edbp c\u1ee7a tr\u01b0\u1eddng X thu \u0111\u01b0\u1ee3c trong b\u1ea3ng sau:<\/p><svg height=\"300\" width=\"220\"> <g><title><\/title><rect fill=\"#fff\" height=\"302\" id=\"canvas_background\" width=\"222\" 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> 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y2=\"82.20218\"><\/line> <line fill=\"none\" id=\"svg_6\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"108.45561\" y2=\"108.88003\"><\/line> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"135.13346\" y2=\"135.55788\"><\/line> <line fill=\"none\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"160.92205\" y2=\"161.34647\"><\/line> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"187.59991\" y2=\"188.02432\"><\/line> <line fill=\"none\" id=\"svg_10\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"214.27776\" y2=\"214.70218\"><\/line> <line fill=\"none\" id=\"svg_11\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"241.84487\" y2=\"242.26929\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_12\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"39.31535\" xml:space=\"preserve\" y=\"24.89631\">S\u1ed1 \u0111i\u1ec3m<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_13\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"124.31535\" xml:space=\"preserve\" y=\"24.89631\">S\u1ed1 h\u1ecdc sinh<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"63.31535\" xml:space=\"preserve\" y=\"51.89631\">1<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_16\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"63.31535\" xml:space=\"preserve\" y=\"81.89632\">2<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_17\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"62.31535\" xml:space=\"preserve\" y=\"112.89632\">3<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_18\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"61.31535\" xml:space=\"preserve\" y=\"143.89632\">4<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_19\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"60.31535\" xml:space=\"preserve\" y=\"174.89632\">5<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_20\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"59.31535\" xml:space=\"preserve\" y=\"201.89632\">6<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_21\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"59.31535\" xml:space=\"preserve\" y=\"231.89632\">7<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_22\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"58.31535\" xml:space=\"preserve\" y=\"262.89632\">8<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_23\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1,0,0,0.8892617225646972,-16,-0.8313756091991421) \" x=\"59.31535\" xml:space=\"preserve\" y=\"292.89632\">9<\/text> <line fill=\"none\" id=\"svg_25\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.31535\" x2=\"217.31535\" y1=\"267.84487\" y2=\"268.26929\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_26\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"38.31535\" xml:space=\"preserve\" y=\"286.52273\">10<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_27\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"135.31535\" xml:space=\"preserve\" y=\"48.52273\">12<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_28\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"136.31535\" xml:space=\"preserve\" y=\"72.52273\">14<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_29\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"136.31535\" xml:space=\"preserve\" y=\"100.52273\">16<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_30\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"135.31535\" xml:space=\"preserve\" y=\"127.52273\">16<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_31\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"137.31535\" xml:space=\"preserve\" y=\"234.52273\">14<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_32\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"136.31535\" xml:space=\"preserve\" y=\"155.52273\">17<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_33\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"135.31535\" xml:space=\"preserve\" y=\"179.52273\">17<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_34\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"137.31535\" xml:space=\"preserve\" y=\"207.52273\">18<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_35\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"138.31535\" xml:space=\"preserve\" y=\"260.52273\">13<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_36\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"139.31535\" xml:space=\"preserve\" y=\"288.52273\">13<\/text> <\/g> <\/g> <\/svg><\/span><\/p>D\u1ef1 \u0111oán trong nhóm 90 h\u1ecdc sinh l\u1edbp 8 \u0111\u01b0\u1ee3c ch\u1ecdn ng\u1eabu nhiên t\u1eeb 4 l\u1edbp khác c\u1ee7a tr\u01b0\u1eddng X, có bao nhiêu h\u1ecdc sinh có s\u1ed1 \u0111i\u1ec3m không v\u01b0\u1ee3t quá 5?<\/p>","options":["A.<\/strong> 40 ","B.<\/strong> 43 ","C.<\/strong> 54","D.<\/strong> 45"],"correct":"4","level":"2","hint":"","answer":"Trong 150 h\u1ecdc sinh l\u1edbp 8 \u0111\u01b0\u1ee3c ch\u1ecdn ng\u1eabu nhiên có s\u1ed1 h\u1ecdc sinh \u0111\u1ea1t \u0111i\u1ec3m không v\u01b0\u1ee3t quá 5 là:<\/p>12 + 14 + 16 + 16  + 17 = 75 (h\u1ecdc sinh).<\/p>Xác su\u1ea5t bi\u1ebfn c\u1ed1 E: "H\u1ecdc sinh \u0111ó có \u0111i\u1ec3m không v\u01b0\u1ee3t quá 5" \u0111\u01b0\u1ee3c \u01b0\u1edbc l\u01b0\u1ee3ng là: <\/p>$\\dfrac{75}{150}=\\dfrac{1}{2}$<\/span>.<\/p>Trong nhóm 90 h\u1ecdc sinh l\u1edbp 8 \u0111\u01b0\u1ee3c ch\u1ecdn ng\u1eabu nhiên t\u1eeb 4 l\u1edbp khác c\u1ee7a tr\u01b0\u1eddng X, s\u1ed1 h\u1ecdc sinh có s\u1ed1 \u0111i\u1ec3m không v\u01b0\u1ee3t quá 5 là 90 . $\\dfrac{1}{2}$<\/span> = 45 (h\u1ecdc sinh).<\/p>Ch\u1ecdn D.<\/strong> 45.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-09-03 07:10:40","option_type":"txt","len":0}]}