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If A and B are two events such that P(A) = 0.5, P(B) =0.6 and `P (A nnB) =0.4`, then what is `Pbar(A uu B)` equal to ?

A

0.9

B

0.7

C

0.5

D

0.3

Text Solution

Verified by Experts

The correct Answer is:
D
`P(A) = 0.5,P(B) =0.6 , P(AnnB) = 0.4`
`Pbar((A uuB)) = 1 - P(AuuB)`
`= 1 - [P(A) +P(B) -P(A nn B)]`
` 1 - [0.5 + 0.6 - 0.4]`
`= 1-0.7 = 0.3`
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