MATH
posted by lANEY .
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?

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