9 choose 5

解

9 C 5

126

解答ステップ

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

挿入

n = 9, r = 5

= \frac{9 !}{5 ! ( 9 - 5 ) !}

\frac{9 !}{5 ! ( 9 - 5 ) !} = 126

= 126

mi d r an g e 12, 6, 7, 3, 10

a r i t hm e t i c m e an \frac{60}{11}, \frac{65}{12}, \frac{70}{13}, \frac{75}{14}, \frac{16}{3}

m o d e 2, 5, 1, 6, 8, 4, 9, 6, 3, 6

a r i t hm e t i c m e an 40, 10

a r i t hm e t i c m e an 12.5, 9.8, 13.5, 11.2, 12.3, 14.2, 11.7, 9.8, 12.6, 10.4