设P(A)=1/3,P(B)=1/2,试就以下3种情况分别求 (1)(2)(3)

设P(A)=1/3,P(B)=1/2,试就以下3种情况分别求<img src='https://img2.soutiyun.com/ask/2020-09-29/970246138988157.png' /> (1)<img src='https://img2.soutiyun.com/ask/2020-09-29/970246130715684.png' />(2)<img src='https://img2.soutiyun.com/ask/2020-09-29/970246155261088.png' />(3)<img src='https://img2.soutiyun.com/ask/2020-09-29/970246165538676.png' />

时间:2024-02-29 05:35:04

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