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there are 20 seventh graders and 15 eighth graders in a club. A club president will be chosen at random. Compare the probabilities of choosing a seventh grader or an eighth grader.
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there are 20 seventh graders and 15 eighth graders in a club. A club president will be chosen at random. Compare the probabilities of choosing a seventh grader or an eighth grader.

User Doobean
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There is a 3/7 chance an eighth grader will be chosen where there's 4/7 of a chance a seventh grader will be chosen. There is a 1/7 more of a chance a seventh grader will be chosen.
User ChrisBe
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