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Two friends A and B have equal number of...

Two friends A and B have equal number of sons. There are 3 cinema tickets which are to be distributed among the sons of A and B. The probability that all the tickets go to the sons of B is `1//20`. The no. of sons each of them having is

A

`2`

B

`4`

C

`5`

D

`3`

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The correct Answer is:
D
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