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If P(B)=3/5,P(A//B)=1/2andP(AcupB)=4/5, ...

If P(B)`=3/5,P(A//B)=1/2andP(AcupB)=4/5`, then `P(AcupB)'+P(A'cupB)` is equal to

A

`1/5`

B

`4/5`

C

`1/2`

D

1

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The correct Answer is:
D
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