Page 117 - Fixtures
P. 117
@ @pbjïØ Üa@ @QPR
. .10 + 20 + 2 = 32
[MAΘ 2011] ( )
10 6 8
.
.
C(8, 2)
C(10, 3)
.6
. 6 ×C(8,2) ×C(10, 3) = 6 × 8 ! × 10! = 20160 )
6!×2! 3!×7!
15 [MAΘ 2011] (
.
15 − n . n
.
