Math

Mr. Jefferson has 20 students in his class. He wants to send 4 of these students to pick up books for the class.
How many combinations of 4 students can he choose?

A)5
B)80
C)4845
D)116,280

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asked by Cat
  1. 20C4
    where nCr=n!/((n-r)!r!)

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  2. The answer is B

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    posted by Savage
  3. Bakhrom Khalmatov is not savage

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