12 choose 2

Lösung

12 C 2

66

Schritte zur Lösung

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

Setze ein

n = 12, r = 2

= \frac{12 !}{2 ! ( 12 - 2 ) !}

\frac{12 !}{2 ! ( 12 - 2 ) !} = 66

= 66

4 C 0

P (7, 2)

a r i t hm e t i c m e an 2, 4, 5, 6, 7, 9, 11, 12, 12, 12, 12, 13, 15, 17, 17, 21, 22, 30

5 c 3

a r i t hm e t i c m e an 2, 3, 4, 5, 6