6P3

解答

6 P 3

120

求解步骤

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

代入

n = 6, r = 3

= \frac{6 !}{( 6 - 3 ) !}

\frac{6 !}{( 6 - 3 ) !} = 120

= 120

m o d e 69, 73, 65, 70, 71, 74, 65, 69, 60, 62

v a r ian ce 9, 8, 6, 6, 8, 6, 3, 9, 4, 6

a r i t hm e t i c m e an 20, 16, 18, 14, 9, 20, 16

f i rs tq u a r t i l e 1, 2, 3, 4, 5, 6, 7, 8

5 c 5