Kombinasi: Perbedaan antara revisi
Konten dihapus Konten ditambahkan
Baris 173:
: <math>C^{12}_3 = \frac{12!}{3! (12-3)!} = \frac{12!}{3! 9!} = \frac{12 \cdot 11 \cdot 10 \cdot 9!}{3 \cdot 2 \cdot 1 \cdot 9!} = 220 cara</math>
** sama
; <math>C^{5}_3 + C^{4}_3 + C^{3}_3 = \frac{5!}{3! (5-3)!} + \frac{4!}{3! (4-3)!} + \frac{3!}{3! (3-3)!} = \frac{5!}{3! 2!} + \frac{4!}{3! 1!} + \frac{3!}{3! 0!} = \frac{5 \cdot 4 \cdot 3!}{2 \cdot 1 \cdot 3!} + \frac{4 \cdot 3!}{1 \cdot 3!} + \frac{3!}{1 \cdot 3!} = 10 + 4 + 1 = 15 cara</math>
== Lihat pula ==
| |||