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March 29, 2017

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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?

  • Math - ,

    so take the seniors out of the problem

    how many groups of 8 from 14 ?

    combinations:

    C(n,r) = n!/[ r!*(n-r)!]

    C(14,8) = 14!/ [8! *6!]

    = 14*13*12*11*10*9/(6*5*4*3*2)

    = 7*13*11*3 = 3003

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