Mathematics, 24.03.2021 01:00 keshjdjsjs

In a class of 18 students, 5 have a brother and 11 have a sister. There are 5 students who do not have any siblings. What is the probability that a student has a sister given that they do not have a brother?

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In a class of 18 students, 5 have a brother and 11 have a sister. There are 5 students who do not ha...