Mathematics, 24.03.2021 01:20, 123iamthe1

In a class of 30 students, 5 have a brother and 20 have a sister. There are 2 students who have a brother and a sister. What is the probability that a student who has a brother also has a sister?

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In a class of 30 students, 5 have a brother and 20 have a sister. There are 2 students who have a br...

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