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标题: [求助]gwd 18-32 [打印本页]

作者: 月影无痕 时间: 2005-12-6 07:15 标题: [求助]gwd 18-32

What is the probability that event E or event F or both will occur?

(1) The probability that event E will occur is 0.6.

(2) The probability that event F will occur is 0.4.

答案为什么是E？我选C

作者: 虚无飘渺 时间: 2005-12-6 19:23

a typical eithor-or choice.

they can be either mutually exclusive or intersected

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