{"common":{"save":0,"post_id":"5825","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7688","post_id":"5825","mon_id":"1158532","chapter_id":"1158661","question":"<p>Trong m\u1ed9t trò ch\u01a1i hay thí nghi\u1ec7m, n\u1ebfu có k 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 <input class=\"_tit_hoi\" disabled=\"disabled\" type=\"text\"\/><\/p>","options":["0","1","<span class=\"math-tex\">$\\dfrac{1}{k}$<\/span>"],"correct":"3","level":"2","hint":"","answer":"<p>Trong m\u1ed9t trò ch\u01a1i hay thí nghi\u1ec7m, n\u1ebfu có k 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:#16a085;\"><span class=\"math-tex\">$\\dfrac{1}{k}$<\/span><\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{1}{k}$<\/span><\/span><\/p>","type":"choose","extra_type":"balloon","time":"0","user_id":"131","test":"1","date":"2022-05-02 14:31:17","option_type":"math","len":0},{"id":"7690","post_id":"5825","mon_id":"1158532","chapter_id":"1158661","question":"<p>Gieo m\u1ed9t \u0111\u1ed3ng xu cân \u0111\u1ed1i. Xét hai bi\u1ebfn c\u1ed1 sau:<\/p><p><span style=\"color:#2980b9;\">C: "\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t s\u1ea5p"<\/span><\/p><p><span style=\"color:#2980b9;\">D: "\u0110\u1ed3ng xu xu\u1ea5t hi\u1ec7n m\u1eb7t ng\u1eeda"<\/span><\/p><p>H\u1ecfi hai bi\u1ebfn c\u1ed1 C và D có \u0111\u1ed3ng kh\u1ea3 n\u0103ng không?<\/p>","options":["Có","Không"],"correct":"1","level":"2","hint":"","answer":"<p>Vì \u0111\u1ed3ng xu cân \u0111\u1ed1i nên bi\u1ebfn c\u1ed1 C và D có kh\u1ea3 n\u0103ng x\u1ea3y ra là nh\u01b0 nhau. Ta nói hai bi\u1ebfn c\u1ed1 C và D là \u0111\u1ed3ng kh\u1ea3 n\u0103ng.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\">Có<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-02 14:37:08","option_type":"txt","len":1},{"id":"7695","post_id":"5825","mon_id":"1158532","chapter_id":"1158661","question":"<p>Gieo m\u1ed9t con xúc x\u1eafc 6 m\u1eb7t \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o cân \u0111\u1ed1i. Tìm xác su\u1ea5t \u0111\u1ec3 s\u1ed1 ch\u1ea5m xu\u1ea5t hi\u1ec7n trên con xúc x\u1eafc là 4.<\/p>","options":["<span class=\"math-tex\">$\\dfrac{1}{4}$<\/span>","1","<span class=\"math-tex\">$\\dfrac{1}{6}$<\/span>","0"],"correct":"3","level":"2","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<span style=\"color:#2980b9;\"> k<\/span> 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 6 bi\u1ebfn c\u1ed1 sau:<\/p><p><span class=\"math-tex\">$A_1$<\/span>:"S\u1ed1 ch\u1ea5m xu\u1ea5t hi\u1ec7n trên con xúc x\u1eafc là 1"<\/p><p><span class=\"math-tex\">$A_2$<\/span>:"S\u1ed1 ch\u1ea5m xu\u1ea5t hi\u1ec7n trên con xúc x\u1eafc là 2"<\/p><p><span class=\"math-tex\">$A_3$<\/span>:"S\u1ed1 ch\u1ea5m xu\u1ea5t hi\u1ec7n trên con xúc x\u1eafc là 3"<\/p><p><span style=\"color:#2980b9;\"><span class=\"math-tex\">$A_4$<\/span>:"S\u1ed1 ch\u1ea5m xu\u1ea5t hi\u1ec7n trên con xúc x\u1eafc là 4"<\/span><\/p><p><span class=\"math-tex\">$A_5$<\/span>:"S\u1ed1 ch\u1ea5m xu\u1ea5t hi\u1ec7n trên con xúc x\u1eafc là 5"<\/p><p><span class=\"math-tex\">$A_6$<\/span>:"S\u1ed1 ch\u1ea5m xu\u1ea5t hi\u1ec7n trên con xúc x\u1eafc là 6"<\/p><p>Vì con xúc x\u1eafc cân \u0111\u1ed1i nên 6 bi\u1ebfn c\u1ed1 trên có kh\u1ea3 n\u0103ng x\u1ea3y ra nh\u01b0 nhau. Ta nói 6 bi\u1ebfn c\u1ed1 này \u0111\u1ed3ng kh\u1ea3 n\u0103ng.<\/p><p>M\u1eb7t khác, trong m\u1ed7i l\u1ea7n gieo, luôn x\u1ea3y ra duy nh\u1ea5t m\u1ed9t trong <span style=\"color:#2980b9;\">6<\/span> bi\u1ebfn c\u1ed1 này nên xác su\u1ea5t c\u1ee7a chúng b\u1eb1ng nhau và b\u1eb1ng <span class=\"math-tex\">$\\dfrac{1}{6}$<\/span><\/p><p>V\u1eady xác su\u1ea5t \u0111\u1ec3 s\u1ed1 ch\u1ea5m xu\u1ea5t hi\u1ec7n trên con xúc x\u1eafc là 4 b\u1eb1ng <span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{1}{6}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-02 14:52:06","option_type":"math","len":0}]}