总共有C(52, 13),
先pick 四张的花有四种,然后C(13, 4) * C(13,3)^3?
所以结果是 C(13, 4) * C(13,3)^3? * 4 / C (52, 13)?
总共有C(52, 13),
先pick 四张的花有四种,然后C(13, 4) * C(13,3)^3?
所以结果是 C(13, 4) * C(13,3)^3? * 4 / C (52, 13)?
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我数学完蛋的,不要信我。。。
-古代的事物-
♂
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12/13/2018 postreply
15:28:12
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多了个问号,呵呵。
-古代的事物-
♂
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12/13/2018 postreply
15:28:50
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结果是0.0263 吗?
-breehm-
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12/13/2018 postreply
15:34:03
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