SOLUTION: Evaluate 6C4 1. 2 2. 30 3. 24 4. 15 I need some help with this. Thank you!

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Question 490415: Evaluate 6C4
1. 2
2. 30
3. 24
4. 15
I need some help with this. Thank you!
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
6C4 = 6!/((6-4)!4!) = 15

Or, you could evaluate 6C2 (since nCk = nC(n-k)), or 6*5/2! = 15.