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 cơ bản

{"common":{"save":0,"post_id":"6672","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6800","post_id":"6672","mon_id":"1158921","chapter_id":"1158935","question":"M\u1ed9t c\u1eeda hàng th\u1ed1ng kê s\u1ed1 l\u01b0\u1ee3ng các lo\u1ea1i máy tính bán \u0111\u01b0\u1ee3c trong m\u1ed9t n\u0103m nh\u01b0 sau:<\/p><svg height=\"120\" width=\"400\"> <g><title><\/title><rect fill=\"#fff\" height=\"122\" id=\"canvas_background\" width=\"402\" 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><rect fill=\"#fff\" height=\"92\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"370\" x=\"16\" y=\"13.25\"><\/rect> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"16\" x2=\"386\" y1=\"52\" y2=\"52\"><\/line> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"136\" x2=\"136\" y1=\"14.25\" y2=\"105.25\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"216\" x2=\"216\" y1=\"14.25\" y2=\"105.25\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"302\" x2=\"302\" y1=\"14.25\" y2=\"105.25\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"47\" xml:space=\"preserve\" y=\"43.25\">Lo\u1ea1i<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_7\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"22\" xml:space=\"preserve\" y=\"86.25\">S\u1ed1 l\u01b0\u1ee3ng<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"165\" xml:space=\"preserve\" y=\"42.25\">A<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"251\" xml:space=\"preserve\" y=\"42.25\">B<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"336\" xml:space=\"preserve\" y=\"42.25\">C<\/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=\"154\" xml:space=\"preserve\" y=\"85.25\">153<\/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=\"242\" xml:space=\"preserve\" y=\"85.25\">201<\/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=\"327\" xml:space=\"preserve\" y=\"86.25\">180<\/text> <\/g> <\/svg><\/span><\/p>Tính xác su\u1ea5t th\u1ef1c nghi\u1ec7m c\u1ee7a bi\u1ebfn c\u1ed1 X: "Chi\u1ebfc máy tính B \u0111\u01b0\u1ee3c bán ra trong n\u0103m \u0111ó c\u1ee7a c\u1eeda hàng".<\/p>","options":["A.<\/strong> $\\dfrac{51}{178}$<\/span>","B.<\/strong> $\\dfrac{30}{89}$<\/span>","C.<\/strong> $\\dfrac{67}{178}$<\/span>","D.<\/strong> $\\dfrac{111}{178}$<\/span>"],"correct":"3","level":"1","hint":"","answer":"T\u1ed5ng s\u1ed1 máy tính bán \u0111\u01b0\u1ee3c trong n\u0103m \u0111ó là: 153 + 201 + 180 = 534 (chi\u1ebfc)<\/p>Xác su\u1ea5t th\u1ef1c nghi\u1ec7m c\u1ee7a bi\u1ebfn c\u1ed1 X là: $\\dfrac{201}{534}=\\dfrac{67}{178}$<\/span><\/p>Ch\u1ecdn C.<\/strong> $\\dfrac{67}{178}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-09-03 06:08:48","option_type":"math","len":0},{"id":"6802","post_id":"6672","mon_id":"1158921","chapter_id":"1158935","question":"M\u1ed9t c\u1eeda hàng th\u1ed1ng kê s\u1ed1 l\u01b0\u1ee3ng các lo\u1ea1i máy tính bán \u0111\u01b0\u1ee3c trong m\u1ed9t n\u0103m nh\u01b0 sau:<\/p><svg height=\"120\" width=\"400\"> <g><title><\/title><rect fill=\"#fff\" height=\"122\" id=\"canvas_background\" width=\"402\" 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><rect fill=\"#fff\" height=\"92\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"370\" x=\"16\" y=\"13.25\"><\/rect> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"16\" x2=\"386\" y1=\"52\" y2=\"52\"><\/line> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"136\" x2=\"136\" y1=\"14.25\" y2=\"105.25\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"216\" x2=\"216\" y1=\"14.25\" y2=\"105.25\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"302\" x2=\"302\" y1=\"14.25\" y2=\"105.25\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"47\" xml:space=\"preserve\" y=\"43.25\">Lo\u1ea1i<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_7\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"22\" xml:space=\"preserve\" y=\"86.25\">S\u1ed1 l\u01b0\u1ee3ng<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"165\" xml:space=\"preserve\" y=\"42.25\">A<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"251\" xml:space=\"preserve\" y=\"42.25\">B<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"336\" xml:space=\"preserve\" y=\"42.25\">C<\/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=\"154\" xml:space=\"preserve\" y=\"85.25\">153<\/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=\"242\" xml:space=\"preserve\" y=\"85.25\">201<\/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=\"327\" xml:space=\"preserve\" y=\"86.25\">180<\/text> <\/g> <\/svg><\/span><\/p>Tính xác su\u1ea5t th\u1ef1c nghi\u1ec7m c\u1ee7a bi\u1ebfn c\u1ed1 X: "Chi\u1ebfc máy tính C \u0111\u01b0\u1ee3c bán ra trong n\u0103m \u0111ó c\u1ee7a c\u1eeda hàng".<\/p>","options":["A.<\/strong> $\\dfrac{57}{178}$<\/span>","B.<\/strong> $\\dfrac{30}{89}$<\/span>","C.<\/strong> $\\dfrac{67}{178}$<\/span>","D.<\/strong> $\\dfrac{111}{178}$<\/span>"],"correct":"2","level":"1","hint":"","answer":"T\u1ed5ng s\u1ed1 máy tính bán \u0111\u01b0\u1ee3c trong n\u0103m \u0111ó là: 153 + 201 + 180 = 534 (chi\u1ebfc)<\/p>Xác su\u1ea5t th\u1ef1c nghi\u1ec7m c\u1ee7a bi\u1ebfn c\u1ed1 X là: $\\dfrac{180}{534}=\\dfrac{30}{89}$<\/span><\/p>Ch\u1ecdn B.<\/strong> $\\dfrac{30}{89}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-09-03 06:10:40","option_type":"math","len":0},{"id":"6806","post_id":"6672","mon_id":"1158921","chapter_id":"1158935","question":"Trong 250 000 tr\u1ebb em s\u01a1 sinh chào \u0111\u1eddi có 125 050 bé gái. Tính xác su\u1ea5t th\u1ef1c nghi\u1ec7m c\u1ee7a bi\u1ebfn c\u1ed1 "Bé trai \u0111\u01b0\u1ee3c sinh ra".<\/p>","options":["A.<\/strong> 0,4590","B.<\/strong> 0,4890","C.<\/strong> 0,4098","D.<\/strong> 0,4998"],"correct":"4","level":"1","hint":"","answer":"Trong 250 000 tr\u1ebb em s\u01a1 sinh chào \u0111\u1eddi có 125 050 bé gái nên s\u1ed1 bé trai chào \u0111\u1eddi là:<\/p>250 000 – 125 050 = 124 950 (bé)<\/p>Xác su\u1ea5t th\u1ef1c nghi\u1ec7m c\u1ee7a bi\u1ebfn c\u1ed1 "Bé trai \u0111\u01b0\u1ee3c sinh ra" là: $\\dfrac{124950}{250000}=0,4998$<\/span><\/p>Ch\u1ecdn D.<\/strong> 0,4998<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-09-03 06:15:57","option_type":"txt","len":0}]}