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设A、B为两件事件，已知P(A)=0.3，则有（）

高老师2年前 (2024-03-26)概率论与数理统计（经管类）(04183)14

设A、B为两件事件，已知P(A)=0.3，则有（）

A.

B.

C.

D.

正确答案是C

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