1500 families with 2 children were selected randomly, and the following data were recorded:
Number of girls in a family210Number of families300500700
Compute the probability of a family chosen at random having 2 girls.
15
Probability = Number of favourable outcomesTotal number of outcomes
The total number of families = 300 + 500 + 700 = 1500
The families which have two girls = 300
P (Number of families having two girls) =3001500 =15