Page 119 - Fixtures
P. 119
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.t + r + z = 15 . 2t + 1 + 2r + 2z = 31 )
.C(17,2) = 136 .C(17,2) = 136
A yx
.136 + 136 = 272
. [MAΘ 2010] (
CB
A+B
BC
.A +B = 5+2 = 7 .C = 4! B = 4! A = 5!
BC 2 [AHSME 1994] (
9
)
6
3
.
.
3! .C(5, 3) .
. 3! ×C(5, 3) = 6 ×10 = 60 .
.6! 6
. 6! × 60 = 43200
[AMC12A 2003] ( )
