Mathematics, 28.12.2019 17:31 245cat

There are 7 students in a class: 5 boys and 2 girls.
if the teacher picks a group of 4 at random, what is the probability that everyone in the group is a boy?

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There are 7 students in a class: 5 boys and 2 girls.
if the teacher picks a group of 4 at ran...