Question 462398
If it must have one freshman so now we have a committee of 8 to choose from 14 students.
15C9=5005 ways with everyone.
9C9=1 way with no frosh.
5005-1=5004 different ways can a committee of 9 members be chosen from 6 freshmen, 5 sophomores, and 4 juniors if the committee must consist of at least one freshman.
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Ed