Asked by Cat
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
Answers
Answered by
MathMate
20C4
where nCr=n!/((n-r)!r!)
where nCr=n!/((n-r)!r!)
Answered by
Savage
The answer is B
Answered by
Hamza is not savage
Bakhrom Khalmatov is not savage
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