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LenKa [72]
3 years ago
15

In how many ways can you arrange 3 out of 5 books (a, b, c, d, and

Mathematics
1 answer:
soldi70 [24.7K]3 years ago
3 0
Yes bro...
the easiest way is to use 5C3
= 5! /(5-3)!3!
= 5(5-1)(5-2)(5-3)!/ (5-3)!3!
= 5×4×3×2/3×2
= 5×4 = 20ways
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