Page 79 - Fixtures
P. 79
@ @pbjïØ Üa@ @VT
.C(6,2)×C(5,2) = 6! × 5! = 15 ×10 = 150 :
4!!× 2! 3!!× 2!
m ×n
.C(m + 1,2)×C(n + 1,2)
.
()
.
. 8
. 11
.C(11, 8) = 11! = 165
8!!× 3!
()
x1 + x2 + x3 + x4 = 60
yi = xi − 1 .
()
