hitunglah 5C3 kombinasi

5C3
= 5! / 3! . 2!
= 5 . 4 / 2
=5 . 2
= 10

rumus nCk :
[tex]nCk = C(n,k) = \frac{n!}{(n-k)!k!} [/tex]
untuk n = 5 dan k = 3, maka
5C3 = 5! / (5-3)! 3! = (5×4×3×2×1) / (2×1)×(3×2×1)
= (5×4) / (2×1) = 20 / 2 = 10