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If P(A)=(1)/(3)P(B) and P(A uu B)=0.5 wh...

If `P(A)=(1)/(3)P(B)` and `P(A uu B)=0.5` when A, B are mutually exclusive events. Then `P(A)=`
1) `(1)/(8)` 2) `(1)/(2)` 3) `(3)/(4)` 4) `(3)/(8)`

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