{"common":{"save":0,"post_id":"6482","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6710","mon_id":"1158767","chapter_id":"1158893","post_id":"6482","question":"<p>Công th\u1ee9c tính s\u1ed1 t\u1ed5 h\u1ee3p ch\u1eadp k c\u1ee7a n ph\u1ea7n t\u1eed là<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$A_n^k = \\dfrac{n!}{(n-k)!}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$A_n^k = \\dfrac{n!}{(n-k)!k!}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$C_n^k = \\dfrac{n!}{(n-k)!k!}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$C_n^k = \\dfrac{n!}{(n-k)!}$<\/span>"],"correct":"3","level":"1","hint":"","answer":"<p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>C.<\/strong> <span class=\"math-tex\">$C_n^k = \\dfrac{n!}{(n-k)!k!}$<\/span> <\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-29 04:25:55","option_type":"math","len":0},{"id":"6712","mon_id":"1158767","chapter_id":"1158893","post_id":"6482","question":"<p>Công th\u1ee9c tính s\u1ed1 ch\u1ec9nh h\u1ee3p ch\u1eadp k c\u1ee7a n ph\u1ea7n t\u1eed là<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$A_n^k = \\dfrac{n!}{(n-k)!}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$A_n^k = \\dfrac{n!}{(n-k)!k!}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$C_n^k = \\dfrac{n!}{(n-k)!k!}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$C_n^k = \\dfrac{n!}{(n-k)!}$<\/span>"],"correct":"1","level":"1","hint":"","answer":"<p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>A.<\/strong> <span class=\"math-tex\">$A_n^k = \\dfrac{n!}{(n-k)!}$<\/span> <\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-29 04:27:40","option_type":"math","len":0},{"id":"6714","mon_id":"1158767","chapter_id":"1158893","post_id":"6482","question":"<p>Tính s\u1ed1 ch\u1ec9nh h\u1ee3p ch\u1eadp 4 c\u1ee7a 6 ph\u1ea7n t\u1eed.<\/p>","options":["<strong>A. <\/strong>24","<strong>B.<\/strong> 720","<strong>C.<\/strong> 35","<strong>D.<\/strong> 360"],"correct":"4","level":"1","hint":"","answer":"<p>Ta có <span class=\"math-tex\">$A_6^4 = \\dfrac{6!}{(6-4)!}$<\/span> = 360.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>D.<\/strong> 360<\/span> .<\/p>","type":"choose","extra_type":"shape1","user_id":"131","test":"0","date":"2023-05-29 04:30:59","option_type":"txt","len":0}]}
