How many ways can three people be selected from a group of seven people if order DOES matter?

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How many ways can three people be selected from a group of seven people if order
DOES matter?

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Khang Minh 4 years 2021-08-26T07:20:05+00:00 1 Answers 19 views 0

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  1. giabao
    0
    2021-08-26T07:21:51+00:00
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    Answer:

    210 ways

    Step-by-step explanation:

    The is a permution problem.

    Formula for permutations of r things taken from n things is

    P(n,r) = \frac{n!}{(n - r)!}

    \frac{7!}{(7 - 3)!} = \frac{7!}{4!} = 7*6*5 = 210 ways

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