Math
posted by Amy on .
from a group of 14 junior and 9 senior students, determine how many committees of 8 students can be chosen if all chosen students are junior students?

so take the seniors out of the problem
how many groups of 8 from 14 ?
combinations:
C(n,r) = n!/[ r!*(nr)!]
C(14,8) = 14!/ [8! *6!]
= 14*13*12*11*10*9/(6*5*4*3*2)
= 7*13*11*3 = 3003