Tỉ số của số lần lặp lại một sự kiện so với tổng số lần thực hiện

Home Lớp 5 Toán lớp 5 - Sách Kết nối tri thức Bài 65. Tỉ số của số lần lặp lại một sự kiện so với tổng số lần thực hiệnBài tập nâng cao

{"common":{"save":0,"post_id":"9071","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4977","post_id":"9071","mon_id":"1159414","chapter_id":"1159499","question":"An và Bình cùng ch\u01a1i c\u1edd vua. Trong 9 ván \u0111\u1ea5u, Bình th\u1eafng 4 ván, An th\u1eafng 2 ván, hai b\u1ea1n hòa nhau 3 ván. Tính t\u1ec9 s\u1ed1 c\u1ee7a s\u1ed1 ván Bình thua v\u1edbi t\u1ed5ng s\u1ed1 ván \u0111\u1ea5u.<\/p>","options":["A.<\/strong> $\\dfrac{2}{9}$<\/span>.","B.<\/strong> $\\dfrac{5}{9}$<\/span>.","C.<\/strong> $\\dfrac{1}{9}$<\/span>.","D.<\/strong> $\\dfrac{1}{3}$<\/span>."],"correct":"1","level":"3","hint":"","answer":"Ch\u1ecdn A.<\/strong> $\\dfrac{2}{9}$<\/span>.<\/span><\/p>Vì An th\u1eafng 2 ván nên Bình thua 2 ván.<\/p>T\u1ed5ng s\u1ed1 ván \u0111\u1ea5u là 9.<\/p>T\u1ec9 s\u1ed1 c\u1ee7a s\u1ed1 ván Bình thua v\u1edbi t\u1ed5ng s\u1ed1 ván \u0111\u1ea5u là $\\dfrac{2}{9}$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-27 09:23:30","option_type":"math","len":0},{"id":"4978","post_id":"9071","mon_id":"1159414","chapter_id":"1159499","question":"An và Bình cùng ch\u01a1i c\u1edd vua. Trong 9 ván \u0111\u1ea5u, Bình th\u1eafng 4 ván, An th\u1eafng 2 ván, hai b\u1ea1n hòa nhau 3 ván. Tính t\u1ec9 s\u1ed1 c\u1ee7a s\u1ed1 ván An không th\u1eafng v\u1edbi t\u1ed5ng s\u1ed1 ván \u0111\u1ea5u.<\/p>","options":["A.<\/strong> $\\dfrac{4}{9}$<\/span>.","B.<\/strong> $\\dfrac{2}{9}$<\/span>.","C.<\/strong> $\\dfrac{5}{9}$<\/span>.","D.<\/strong> $\\dfrac{7}{9}$<\/span>."],"correct":"4","level":"3","hint":"","answer":"Ch\u1ecdn D.<\/strong> $\\dfrac{7}{9}$<\/span>.<\/span><\/p>Vì An th\u1eafng 2 ván nên s\u1ed1 ván An không th\u1eafng là 9 – 2 = 7.<\/p>T\u1ed5ng s\u1ed1 ván \u0111\u1ea5u là 9.<\/p>T\u1ec9 s\u1ed1 c\u1ee7a s\u1ed1 ván An không th\u1eafng v\u1edbi t\u1ed5ng s\u1ed1 ván \u0111\u1ea5u là $\\dfrac{7}{9}$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-27 09:27:05","option_type":"math","len":0},{"id":"4996","post_id":"9071","mon_id":"1159414","chapter_id":"1159499","question":"Gieo m\u1ed9t xúc x\u1eafc 30 l\u1ea7n liên ti\u1ebfp \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 nh\u01b0 b\u1ea3ng sau:<\/p><svg height=\"300\" width=\"345\"> <g><title><\/title><rect fill=\"#fff\" height=\"302\" id=\"canvas_background\" width=\"347\" 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=\"#aaff56\" height=\"53\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"340\" x=\"1.9\" y=\"4.65\"><\/rect> <rect fill=\"#ffffaa\" height=\"40\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"1.5\" width=\"340\" x=\"1.9\" y=\"57.65\"><\/rect> <rect fill=\"#ffffaa\" height=\"40\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"1.5\" width=\"340\" x=\"1.9\" y=\"97.65\"><\/rect> <rect fill=\"#ffffaa\" height=\"40\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"1.5\" width=\"340\" x=\"1.9\" y=\"137.65\"><\/rect> <rect fill=\"#ffffaa\" height=\"40\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"1.5\" width=\"340\" x=\"1.9\" y=\"177.65\"><\/rect> <rect fill=\"#ffffaa\" height=\"40\" id=\"svg_7\" stroke=\"#000\" stroke-width=\"1.5\" width=\"340\" x=\"1.9\" y=\"217.65\"><\/rect> <rect fill=\"#ffffaa\" height=\"40\" id=\"svg_8\" stroke=\"#000\" stroke-width=\"1.5\" width=\"340\" x=\"1.9\" y=\"257.65\"><\/rect> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"175.39999\" x2=\"175\" y1=\"3.65\" y2=\"296.64999\"><\/line> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"10.39999\" xml:space=\"preserve\" y=\"36.65\">S\u1ed1 ch\u1ea5m xu\u1ea5t hi\u1ec7n<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"205.39999\" xml:space=\"preserve\" y=\"36.65\">S\u1ed1 l\u1ea7n l\u1eb7p l\u1ea1i<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_12\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"47.39999\" xml:space=\"preserve\" y=\"84.64999\">1 ch\u1ea5m<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_13\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"47.39999\" xml:space=\"preserve\" y=\"125\">2 ch\u1ea5m<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_14\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"47.39999\" xml:space=\"preserve\" y=\"165\">3 ch\u1ea5m<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"47.39999\" xml:space=\"preserve\" y=\"205\">4 ch\u1ea5m<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_16\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"47.39999\" xml:space=\"preserve\" y=\"245\">5 ch\u1ea5m<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_17\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"47.39999\" xml:space=\"preserve\" y=\"285\">6 ch\u1ea5m<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_18\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"250\" xml:space=\"preserve\" y=\"84.64999\">3<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_19\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"250\" xml:space=\"preserve\" y=\"125\">4<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_20\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"250\" xml:space=\"preserve\" y=\"165\">5<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_21\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"250\" xml:space=\"preserve\" y=\"205\">4<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_22\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"250\" xml:space=\"preserve\" y=\"245\">8<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" id=\"svg_23\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"250\" xml:space=\"preserve\" y=\"285\">6<\/text> <\/g> <\/svg><\/span><\/p>M\u1eb7t nào có t\u1ec9 s\u1ed1 c\u1ee7a s\u1ed1 l\u1ea7n xu\u1ea5t hi\u1ec7n và t\u1ed5ng s\u1ed1 l\u1ea7n gieo xúc x\u1eafc l\u1edbn nh\u1ea5t?<\/p>","options":["A.<\/strong> M\u1eb7t 6 ch\u1ea5m.","B.<\/strong> M\u1eb7t 5 ch\u1ea5m.","C.<\/strong> M\u1eb7t 2 ch\u1ea5m","D.<\/strong> M\u1eb7t 1 ch\u1ea5m"],"correct":"2","level":"3","hint":"","answer":"Ch\u1ecdn B.<\/strong> M\u1eb7t 5 ch\u1ea5m.<\/span><\/p>Vì m\u1eb7t 5 ch\u1ea5m xu\u1ea5t hi\u1ec7n nhi\u1ec1u l\u1ea5n nh\u1ea5t (8 l\u1ea7n) nên t\u1ec9 s\u1ed1 c\u1ee7a s\u1ed1 l\u1ea7n xu\u1ea5t hi\u1ec7n m\u1eb7t 5 ch\u1ea5m và t\u1ed5ng s\u1ed1 l\u1ea7n gieo xúc x\u1eafc là l\u1edbn nh\u1ea5t.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-27 10:41:58","option_type":"txt","len":1}]}