SOLUTION: how would a person prove the result algebraically of this problem nCr = nCn-r and explain why it must be true using a Pascals Triangle.

Question 380103: how would a person prove the result algebraically of this problem nCr = nCn-r
and explain why it must be true using a Pascals Triangle.
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
Algebraically they're equivalent, it's very simple to prove:

It's also true because Pascal's triangle is symmetric.
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