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从1.2.3.4.5中任取2个不同的数,事件A:“取到的2个数之和为偶数”,事件...
从1.2.3.4.5中任取2个不同的数,事件A:“取到的2个数之和为偶数”,事件B:“取到的2个数均为偶数”,则P(B|A)=( )
A.
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B.
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C.
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D.
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