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LAMONT IS REQ TO READ 1 BIO, 1 SCIENCE, AND 1 POETRY BOOK EACH MONTH. HIS BOOK CHOICES ARE:

2 DIFF BIOS
3 DIFF SCIENCE
3 DIFF POETRY

HOW MANY COMBINATIONS OF REQ BOOKS ARE POSSIBLE?

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it would be C(2,1)*C(3,1)*C(3,1) = 2x3x3 = 18

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