3 years ago

Find the value of the combination. 21 C 3 7,980 2,660 1,330

1 answer:

4 0

To evaluate the combination we proceed as follows:
21C3
Given nCk we shall have:
n!/[(n-k)!k!]
thus plugging the values in the expression we get:
21!/[(21-3)!3!]
=21!/(18!×3!)
=1330
Answer: 1330

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