Mathematics · 2019
JEE Main · 10 April 2019, Shift 1 · Q86
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…
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 :
Official answer
(2)
$\displaystyle \frac{1}{11}$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.