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Q.

A, B, C are tossing a coin on the condition that the person who gets a head first wins the game. If A starts the game then the probability that B wins the game is

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a

17

b

27

c

37

d

47

answer is B.

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Detailed Solution

P(getting head)=12=p P(not  getting head)=12=q        A    B _    C P(B)=pq1−q3=1478             = 27
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