{"common":{"save":0,"post_id":"5826","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7709","post_id":"5826","mon_id":"1158532","chapter_id":"1158661","question":"<p>Gieo m\u1ed9t \u0111\u1ed3ng xu cân \u0111\u1ed1i. Xét các bi\u1ebfn c\u1ed1 sau:<\/p><p>A:"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p"<\/p><p>B:"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p ho\u1eb7c m\u1eb7t ng\u1eeda"<\/p><p>C:"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p và m\u1eb7t ng\u1eeda"<\/p><p>D:"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t ng\u1eeda"<\/p><p>H\u1ecfi trong các bi\u1ebfn c\u1ed1 trên, hai bi\u1ebfn c\u1ed1 nào là \u0111\u1ed3ng kh\u1ea3 n\u0103ng?<\/p>","options":["<strong>A.<\/strong> Hai bi\u1ebfn c\u1ed1 A và C","<strong>B.<\/strong> Hai bi\u1ebfn c\u1ed1 B và C","<strong>C.<\/strong> Hai bi\u1ebfn c\u1ed1 A và D","<strong>D.<\/strong> Hai bi\u1ebfn c\u1ed1 B và D"],"correct":"3","level":"3","hint":"<p>B:"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p ho\u1eb7c m\u1eb7t ng\u1eeda" là bi\u1ebfn c\u1ed1 ch\u1eafc ch\u1eafn<\/p><p>C:"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p và m\u1eb7t ng\u1eeda" là bi\u1ebfn c\u1ed1 không th\u1ec3<\/p>","answer":"<p>Vì \u0111\u1ed3ng xu cân \u0111\u1ed1i nên hai bi\u1ebfn c\u1ed1 A và D có kh\u1ea3 n\u0103ng x\u1ea3y ra là nh\u01b0 nhau.<\/p><p>Ta nói hai bi\u1ebfn c\u1ed1 A và D là \u0111\u1ed3ng kh\u1ea3 n\u0103ng.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>C.<\/strong> Hai bi\u1ebfn c\u1ed1 A và D<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-03 08:04:24","option_type":"txt","len":2},{"id":"7711","post_id":"5826","mon_id":"1158532","chapter_id":"1158661","question":"<p>Gieo m\u1ed9t \u0111\u1ed3ng xu cân \u0111\u1ed1i. H\u1ecfi trong các bi\u1ebfn c\u1ed1 sau, bi\u1ebfn c\u1ed1 nào có xác su\u1ea5t b\u1eb1ng 1?<\/p>","options":["<strong>A. <\/strong>"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p"","<strong>B. <\/strong>"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p ho\u1eb7c m\u1eb7t ng\u1eeda"","<strong>C. <\/strong>"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p và m\u1eb7t ng\u1eeda"","<strong>D. <\/strong>"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t ng\u1eeda""],"correct":"2","level":"3","hint":"","answer":"<p>Khi gieo m\u1ed9t \u0111\u1ed3ng xu cân \u0111\u1ed1i thì luôn gieo \u0111\u01b0\u1ee3c m\u1eb7t s\u1ea5p ho\u1eb7c m\u1eb7t ng\u1eeda.<\/p><p>Do \u0111ó bi\u1ebfn c\u1ed1 "\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p ho\u1eb7c m\u1eb7t ng\u1eeda" là m\u1ed9t bi\u1ebfn c\u1ed1 ch\u1eafn ch\u1eafn nên xác su\u1ea5t c\u1ee7a nó b\u1eb1ng 1.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B. <\/strong>"\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p ho\u1eb7c m\u1eb7t ng\u1eeda"<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-03 08:09:28","option_type":"txt","len":3},{"id":"7714","post_id":"5826","mon_id":"1158532","chapter_id":"1158661","question":"<p>M\u1ed9t t\u1ed5 h\u1ecdc sinh c\u1ee7a l\u1edbp 7A có 4 b\u1ea1n nam và 4 b\u1ea1n n\u1eef. Giáo viên g\u1ecdi ng\u1eabu nhiên m\u1ed9t b\u1ea1n lên b\u1ea3ng \u0111\u1ec3 ki\u1ec3m tra bài t\u1eadp. Tính xác su\u1ea5t c\u1ee7a bi\u1ebfn c\u1ed1 <span style=\"color:#2980b9;\">X:"B\u1ea1n \u0111\u01b0\u1ee3c g\u1ecdi là b\u1ea1n n\u1eef"<\/span><\/p>","options":["1","0","5","0,5"],"correct":"4","level":"3","hint":"<p>Trong m\u1ed9t trò ch\u01a1i hay thí nghi\u1ec7m, n\u1ebfu có <span style=\"color:#2980b9;\">k<\/span> bi\u1ebfn c\u1ed1 \u0111\u1ed3ng kh\u1ea3 n\u0103ng và luôn x\u1ea3y ra duy nh\u1ea5t m\u1ed9t bi\u1ebfn c\u1ed1 trong k bi\u1ebfn c\u1ed1 này thì xác su\u1ea5t c\u1ee7a m\u1ed7i bi\u1ebfn c\u1ed1 \u0111ó \u0111\u1ec1u b\u1eb1ng <span style=\"color:#2980b9;\"><span class=\"math-tex\">$\\dfrac{1}{k}$<\/span><\/span><\/p>","answer":"<p>Xét hai bi\u1ebfn c\u1ed1<\/p><p>X:"B\u1ea1n \u0111\u01b0\u1ee3c g\u1ecdi là b\u1ea1n n\u1eef"<\/p><p>Y:"B\u1ea1n \u0111\u01b0\u1ee3c g\u1ecdi là b\u1ea1n nam"<\/p><p>Vì s\u1ed1 h\u1ecdc sinh nam và s\u1ed1 h\u1ecdc sinh n\u1eef là b\u1eb1ng nhau (4 = 4) nên hai bi\u1ebfn c\u1ed1 X và Y là \u0111\u1ed3ng kh\u1ea3 n\u0103ng. M\u1eb7t khác, khi g\u1ecdi ng\u1eabu nhiên m\u1ed9t b\u1ea1n lên b\u1ea3ng thì luôn x\u1ea3y ra duy nh\u1ea5t m\u1ed9t trong hai bi\u1ebfn c\u1ed1 này nên m\u1ed7i bi\u1ebfn c\u1ed1 trên \u0111\u1ec1u có xác su\u1ea5t b\u1eb1ng <span class=\"math-tex\">$\\dfrac{1}{2}=0,5$<\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"> 0,5<\/span><\/p>","type":"choose","extra_type":"flower","time":"0","user_id":"131","test":"1","date":"2022-05-03 08:20:09","option_type":"txt","len":0}]}