Mathematics, 21.06.2021 06:00 dai77

There are 9 students in a class: 7 boys and 2 girls. If the teacher picks a group of 3 at random, what is the probability that everyone in the group is a boy?

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There are 9 students in a class: 7 boys and 2 girls. If the teacher picks a group of 3 at random, w...