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Scilla [17]
3 years ago
14

PLEASE HELP ME WITH THIS ONE QUESTION

Mathematics
1 answer:
gavmur [86]3 years ago
5 0

Given:

n=4 and r=3.

To find:

The combinations without repetition are possible if n=4 and r=3.

Solution:

Combination of selecting r item from total n items is:

^nC_r=\dfrac{n!}{r!(n-r)!}

We have n=4 and r=3. By using the above formula, we get

^4C_3=\dfrac{4!}{3!(4-3)!}

^4C_3=\dfrac{4\times 3!}{3!1!}

^4C_3=4

Therefore, the correct option is D.

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