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外语
Let A, B, C, and D be events for which P(A or B)- 0.6, P{A)= 0.2, P(C or D)= 0.6, and P(C)= 0.5. The events A and B are mutually
Let A, B, C, and D be events for which P(A or B)- 0.6, P{A)= 0.2, P(C or D)= 0.6, and P(C)= 0.5. The events A and B are mutually
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2015-04-10
57
问题
Let A, B, C, and D be events for which P(A or B)- 0.6, P{A)= 0.2, P(C or D)= 0.6, and P(C)= 0.5. The events A and B are mutually exclusive, and the events C and D are independent.
(a)Find P(B)
(b)Find P(D)
选项
答案
0.4
解析
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