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Probability | Probability - Exercise 15.1

Question 2

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.

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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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Our top 5% students will be awarded a special scholarship to Lido.

subject-cta

Question 2

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.

Looking to do well in your science exam ? Learn from an expert tutor. Book a free class!

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.

Our top 5% students will be awarded a special scholarship to Lido.

subject-cta
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