Assume that each born child is equally likely to be a boy or a girl. If two families have two children each, then the conditional probability that all children are girls given that at least two are girls is
Assume that each born child is equally likely to be a boy or a girl. If two families have two children each, then the conditional probability that all children are girls given that at least two are girls is
- [JEE MAIN 2019]
- A
$\frac{1}{10}$
- B
$\frac{1}{17}$
- C
$\frac{1}{12}$
- D
$\frac{1}{11}$
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- [IIT 2016]