Question

A class consists of 30 boys and 20 girls 60% of the boys and 40% of the girls are chosen at random find the probability that both of them can swim

Answer 1

The probability of a boy first, then a girl is

30 / 50 × 20 / 49 = 1249

I’ll leave you to work out the probability of girl first, then a boy, but you should end up with exactly the same probability.

Therefore the probability of a boy and a girl, in any order, is double the probability above, of a boy then a girl, or:

24 / 49 .

hope it helps you mate.

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@ ANUSHA ❤✌