[請問] 數學的機率問題:－奇皇后線上看16, 奇皇后線上看15, 奇皇后線上看18, 奇皇后線上看11, 奇皇后線上看第13集, 奇皇后線上看tv, 奇皇后線上看19, 奇皇后線上看第7集

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批踢踢實業坊 ask 板

Nov 19th 2013, 00:19, by alexroc

作者alexroc (吉娃娃大師)

看板ask

標題[請問] 數學的機率問題

時間Tue Nov 19 00:19:01 2013

9個東西裡面要取3個出來，不會重覆，只會被選到1次，其中9個裡面我喜歡的東西有4個，請問取出的3個都是我不喜歡的東西的機率有多高？我數學不好，謝謝 @.@ -- 哈哈哈～ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.36.147.121

→ a88241050:1次取3個? 11/19 00:24

→ alexroc:yes 11/19 00:25

→ varicosis:C5取3 / C9取3 11/19 00:25

推 CryMasK:太久沒算有點忘了以下我做法，錯了不要找我>.<!! 11/19 00:26

→ a88241050:5/42 11/19 00:26

→ CryMasK:分子是C5取3 分母是C9取3 11/19 00:26

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