TaedenK38114 TaedenK38114

03-11-2022
Mathematics

contestada

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?

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KlowieN612309 KlowieN612309

03-11-2022

Combination:

[tex]_nC_r=\frac{n!}{r!(n-r)!}[/tex]

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

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