Probability
posted by Chuck .
How many different committees can be formed from 5 professors, and 15 students. If each committee is made up of 2 professors, and 10 students.

5 choose 2 * 15 choose 12
=5C2*15C12
=5!/(2!3!) * 15!/(12!3!)
=5*4/2! * 15*14*13/6
=10*455
=4550
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