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标题: 一道DS [打印本页]

作者: XIAOYUE78 时间: 2006-5-15 06:58 标题: 一道DS

what is the probability that event A and B both occur?

1) The probability that A occurs is 0.8

2) The probability that B occurs is 0.6

为什么选E，不选C

作者: detectiveyan 时间: 2006-5-15 13:33

因为根本不知道A，B的相互关系，有很多种可能。

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