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Q.

If A and B are disjoint such that P(A) = 2/7, P(B) = 3/5 then  P(A ∪B)

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a

31/35

b

23/30

c

9/10

d

5/8

answer is B.

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Detailed Solution

A, B are disjoint ⇒P(A∪B)=P(A)+P(B)=2/7+3/5=31/35.

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