Answer:
This problem can be solved using combinations, because from a group of people, they want to rearrange into a committee, such that it has no restrictions, and there's no specific order to form it.
So, a represents de number of faculty members and b represents the number of students; c is gonna represent the number of people the committee has to have. Just see that the total number of people is a + b.
Then, using Combination formula, which is: [tex]C(n,r)=\frac{n!}{r!(n-r)!}[/tex]
In the formula, n represents the total number of people, r represents the total number of selected people to form the committee.
So, applying the formula to the problem, variables would be:
n = a + b; r = c.
Hence, [tex]C(a+b,c)=\frac{(a+b)!}{c!((a+b)-c)!}[/tex]
Notice that the result is not a specific number, that is because the problem is general, it doesn't give specific number of people.