[問題] 一題機率
從30雙鞋(60隻)鞋子中隨機抽取20隻鞋子。求正好取出5雙鞋子的機率?
答案是 c(30 5)c(25 10)* 2^10
________________________
c(60 20)
不太懂最後2^10的含意....麻煩大大幫忙解釋~~感激!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 210.85.114.238
推
12/16 21:26, , 1F
12/16 21:26, 1F
推
12/16 21:34, , 2F
12/16 21:34, 2F
推
12/19 16:40, , 3F
12/19 16:40, 3F
→
12/19 16:58, , 4F
12/19 16:58, 4F
→
12/19 16:59, , 5F
12/19 16:59, 5F
→
12/19 17:02, , 6F
12/19 17:02, 6F
討論串 (同標題文章)