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

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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) [br]

选项

答案 0.2

解析

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