A librarian has 20 books. In how many ways can he arrange 15 of them on a shelf?
465,106
225<...
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Mathematics, 23.06.2020 10:57 kylee76
A librarian has 20 books. In how many ways can he arrange 15 of them on a shelf?
465,106
225
1,860,480
15
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Answers: 3
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