Question

Question 2 (iii)
1500 families with 2 children were selected randomly, and the following data were recorded:
$\begin{array}{cccc}\text{Number of girls in a family}& 2& 1& 0\\ \text{Number of families}& 475& 814& 211\end{array}$
Compute the probability of a family, chosen at random, having no girl

Answer 1

Total number of families = 475 +814 + 211= 1500
(iii) Number of families having no girl= 211
$P_3\left(\text{a randomly chosen family has no girl}\right)=\frac{\text{Number families having no girl}}{\text{Total number of families}}$
$P_3\left(\text{a randomly chosen family has no girl}\right)=\frac{211}{1500}$