Wipro Company Numerical Ability Probability

If P(A) = 0.75 and B is an event which is mutually exclusive with A,P(A intersection B)=
a)0.25 b)0.35 c)0.81 d)none

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Wipro Other Question
If P(A) = 1/4,P(B)=2/5 and P(AUB) = 1/2, then P(A intersection B) is
a)0.15 b)0.10 c)0.12 d)0.32 A bag contains 7 green and 8 white balls.If two balls are drawn simutaneously,the probability that both are of the same colour is
a)8/15 b)7/15 c)3/5 d)8/15