1500 families with 2 children were selected randomly, and the following data were recorded:
Compute the probability of a family, chosen at random, having
(i) 2 girls (ii) 1 girl (iii) No girl
Also check whether the sum of these probabilities is 1.
Answer (i)
Probability of a family, chosen at random having 2 girls children
= (Number of families having 2 girls children/ Total number of families)
Answer (ii)
Probability of a family, chosen at random having 1 girl child
= (Number of families having 1 girl child/ Total number of families)
Answer (iii)
Probability of a family, chosen at random having no girl child
= (Number of families having no girl child/ Total number of families)
Sum of all the probabilities
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