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Q.

Three persons A, B, C in order cut a pack of cards replacing them after each cut. The person who first cuts a spade shall win a prize. The ratio of the  probabilities of their winning is

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a

16:12:9

b

12:16:9

c

9:12:16

d

4:3:2

answer is A.

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Detailed Solution

P(A)=p+q3p+.......=1637 P(B)=1237 P(A):P(B):P(C)=16:12:9
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