JEE Math Practice Question
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 :
- A.$${1 \over {10}}$$
- B.$${1 \over {17}}$$
- C.$${1 \over {11}}$$
- D.$${1 \over {12}}$$
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