college math

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How many different committees can be formed from 9 teachers and 39 students if the committee consists of 2 teachers and 3 students? In how many ways can the committee of 5 members be selected?

  • college math -

    number of ways = C(9,2) x C(39,3)
    = 36(9139)
    = ....

    number of committees without restrictions
    = C(48,5) = 1712304

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