Mathematics, 02.01.2020 09:31 ericka79

Of 30 students in a class 17 have a brother, 20 have a sister, and 11 have a brother and a sister. what is the probability that a randomly selected student has a brother given they have a sister?

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Of 30 students in a class 17 have a brother, 20 have a sister, and 11 have a brother and a sister. w...