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Masja [62]
3 years ago
14

How many combinations of four books can be made from eight different books? 24 70 1,680?

Mathematics
1 answer:
djverab [1.8K]3 years ago
3 0

Answer:

70

Step-by-step explanation:

four books can be made from eight different books

4 books to be chosen from 8 books

The order does not matters so we use Combination.

four books can be made from eight different books, so we find 8C4

nCr= \frac{n!}{r!(n-r)!}

8C4= \frac{8!}{4!(8-4)!}

8C4= \frac{8!}{4!(4)!}

8C4= \frac{8*7*6*5*4!}{4!(4)!}=70

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