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NCERT Solutions Class 9 Mathematics Solutions for Probability - Exercise 15.1 in Chapter 15 - Probability

Question 2 Probability - Exercise 15.1

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

Compute the probability of a family, chosen at random, having 2 girls.

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

Answer:

ANSWER:

Total numbers of families = 1500

Numbers of families having 2 girls = 475

Probability = Numbers of families having 2 girls/Total number of families

=\frac{475}{1500}

=\frac{19}{60}

Yes, the sum of these probabilities is 1.

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