A time traveler can take 4 books with him, and he has 86 books to choose from. How many differentways can the books be selected?

asked Mar 24, 2023 158k views

3 votes

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6 votes

Combination:

n is the number of things to choose from, and r is the number of thing

Mjdth answered Mar 28, 2023

by Mjdth

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