If A, B are two events such that P(A')=0...

If A, B are two events such that `P(A')=0.3, P(B)=0.4` and `P(A nn B')=0.5`, then `P(A uu B')` is equal to

A

`0.5`

B

`0.8`

C

1

D

`0.1`

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The correct Answer is:

B

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