SOLUTION: How many commitees of 4 students can be formed from a class of 15 students?

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Question 22202: How many commitees of 4 students can be formed from a class of 15 students?
Found 2 solutions by azn_hannah, Adam:
Answer by azn_hannah(3) (Show Source):
You can put this solution on YOUR website!

Hello, my name is Hannah and I'm here to help solve your problem. In this math problem, you are trying to find how many groups of 4 can you make with 15 students.
First of all, you would divide 15 by 4.
15/4
Now you have 3 and 3/4 (or .75) groups as your answer.
If you need anything else, please don't hesitate to contact me. I'll be more than happy to help. =]

Answer by Adam(64) (Show Source):
You can put this solution on YOUR website!
I belive that this is problem involving combinatorics.So first you should ask does order matter? Does matter in what order you choose students? No, it does not - we will use combinationss (other option would be permutations),and can we repeatedly choose one student? Of course we can not, thus we are going to use combinations without repetition. Formula for that is , where n is number od things you choose from and k is number of things you actually choose. In our case : = 150150 , that is pretty many is it not ?