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13-12-2018
Mathematics

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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, what is the probability that everyone in the group is a boy?

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13-12-2018

Answer:

the ratio woud me 3/3 but the probability is 2 groups of boys and 2 girld and one boy for the last group

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