Mathematics, 30.10.2019 01:31 griseldaguerree

How many ways can a librarian arrange 15 books on a top shelf if she has 20 books from which to pick?
20! /5!
20! /15!
15! /5!

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How many ways can a librarian arrange 15 books on a top shelf if she has 20 books from which to pick? 20! /5! 20! /15! 15! /5!

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Other questions on the subject: Mathematics

Questions in other subjects:

How many ways can a librarian arrange 15 books on a top shelf if she has 20 books from which to pick?
20! /5!
20! /15!
15! /5!