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Q.

Only one of the two events A and B must occur.  If P(A) =23P(B), then the odds infavor of B is

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a

1:2

b

2:1

c

2:3

d

3:2

answer is D.

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Detailed Solution

A∪B=S,A∩B=ϕ, P(A) +P(B) =1 ⇒ A¯=B , B¯=A  P(A) = 23·P(B)⇒ P(B¯) =  23·P(B)⇒The odds infavour of the event B is  P(B): P(B¯) = 3:2∴ Odds favour of B = 3:2
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