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Q.

For any two events A, B if P(A)=13,P(B)=12  P(AB)=16 , then the probability that exactly one of them occurs is 

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a

13

b

12

c

23

d

56

answer is B.

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Detailed Solution

 P(A)=13,P(B)=12,P(AB)=16

P( exactly one of A or B)=P(AB)+P(BA)

=P(A)+P(B)2P(AB)=13+122×16=12

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