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Banyak cara = C(8, 5)
maka
C(n, r) = n!/(r!)(n - r)!
C(8, 5) = 8!/(5!)(8 - 5)!
= 8!/(5!)(3!)
= (8 · 7 · 6 · 5!)/(5!)(3 · 2 · 1)
= (8 · 7 · 6)/(3 · 2 · 1)
= 56 cara
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