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Ncert solutions

1500 families with 2 children were selected randomly, and the following data were recorded:

Compute the probability of a family, chosen at random, having 1 girl

Also, check whether the sum of these probabilities is 1.

ANSWER:

Numbers of families having 1 girls = 814

Probability = Numbers of families having 1 girls/Total numbers of families

=\frac{814}{1500}

=\frac{407}{750}

Yes, the sum of these probabilities is 1.

1500 families with 2 children were selected randomly, and the following data were recorded:

Compute the probability of a family, chosen at random, having 1 girl

Also, check whether the sum of these probabilities is 1.

ANSWER:

Numbers of families having 1 girls = 814

Probability = Numbers of families having 1 girls/Total numbers of families

=\frac{814}{1500}

=\frac{407}{750}

Yes, the sum of these probabilities is 1.

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