Q .     If `A` and `B` are events of a random experiment such that `Pbar((A cup B)) =4/5 , P( barA cup bar(B))= 7/10 ` = and `P(B) =2/5 ` , then `P(A)` equals

BITSAT 2009
A

` 9 /(10)`

B

` 8 /(10)`

C

` 7 /(10)`

D

` 3 /5`

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