Question

$1500$ families with $2$ children were selected randomly and the following data were recorded.

Find the probability of a family, chosen at random having:

i) 2 girls

ii) No girl

Answer 1

(i) $P\left(2girls\right)=\frac{\text{no.of families with 2 girls}}{\text{no. of families with 2 children}}=\frac{475}{1500}$

(ii) $P\left(nogirl\right)=\frac{\text{no.of families with 0 girls}}{\text{no. of families with 2 children}}=\frac{211}{1500}$