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Assume that in family ,each child is equ...

Assume that in family ,each child is equally likely to be a boy or a girl . A family with three children is chosen at random . The probalility that the eldest child is girl given that the family has atleast one girl is

A

`(1)/(2)`

B

`(1)/(3)`

C

`(2)/(3)`

D

`(4)/(7)`

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The correct Answer is:
D
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