先把四种花色每样选三张,然后在剩下的40张牌里面任选一张。所以是:
(C(13,3)^4*C(40,1))/C(52,13)
先把四种花色每样选三张,然后在剩下的40张牌里面任选一张。所以是:
(C(13,3)^4*C(40,1))/C(52,13)
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有重复
-光猜不想-
♂
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12/14/2018 postreply
14:29:43
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有道理
-shantouchen-
♂
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()
12/14/2018 postreply
20:42:01
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