Mathematics, 29.11.2021 14:00 photagraphykid

In a class of 20 students, 5 have a brother and 11 have a sister. There are 3 students who have a brother and a sister. What is the probability that a student who does not have a brother has a sister?

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In a class of 20 students, 5 have a brother and 11 have a sister. There are 3 students who have a br...

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