15 choose 10

פתרון

15 c 10

3003

צעדי פתרון

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

n = 15, r = 10

החלף את

= \frac{15 !}{10 ! ( 15 - 10 ) !}

\frac{15 !}{10 ! ( 15 - 10 ) !} = 3003

= 3003

a r i t hm e t i c m e an 15, 15

5 C 1

s t d 8, 4, 1, 9, 3, 4, 2, 4, 1, 7, 6, 5

52 c 3

s t d 7, 7, 7, 9, 11, 11, 11