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Question

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.

Number of girls in a family210
Number of families475814211

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Solution

According to the given parameters
Total numbers of families given in the question 1500

We want to find out the probability of selecting 2 girls

Number of girls in a family210
Number of families475814211

Numbers of families having 2 girls =475
Probability of choose 2 girls = Numbers of families having 2 girls /Total numbers of families
=4751500

=1960
Hence, Probability of choose 2 girls is 1960


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