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若事件A与B互斥,且P (A)=0.5P(AU B)=0.8,则P (B)等于()《》()
分类: 数学1 (军队文职)
发布时间: 2023-11-03 09:28
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若事件A与B互斥,且P (A)=0.5P(AU B)=0.8,则P (B)等于()《》()
A.0.3
B.0.4
C.0.2
D.0.1
正确答案是A
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