Assume that each born child is equally likely to be a boy or 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:

Question

Assume that each born child is equally likely to be a boy or 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:, 1 12, 1 10, 1 11, 1 17

MARKS App · Accepted Answer

Family has four children in total. ∴ Total number of ways in which at least two girls are there is 4 C 2 + 4 C 3 + 4 C 4 = 11 Favourable case in which all are girls is = 1 ∴ P = 1 11

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