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回复 Czhang271828 枚举了一下,P(A)=P(B)=P(C)=0.5 P(AB)=P(AC)=P(BC)=0.25, 有些迷糊,举1楼 ... realnumber 发表于 2021-6-19 15:59
realnumber: 为什么要有这个概念?两个还可以理解 ...
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2025-7-15 13:51 GMT+8
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