SOLUTION: Evaluate: 6^C4

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Question 423349: Evaluate: 6^C4
Answer by jsmallt9(3758) About Me  (Show Source):
You can put this solution on YOUR website!
If you mean 6C4 then keep reading. If not, then please re-post you question.

nCr = n%21%2F%28r%21%2A%28n-r%29%21%29
So
6C4 = 6%21%2F%284%21%2A%286-4%29%21%29
which simplifies to
6C4 = 6%21%2F%284%21%2A2%21%29
The exclamation points indicate factorials. A factorial of a (non-negative) number is the product of all the integers from 1 to the number. So
6! means 1*2*3*4*5*6
4! means 1*2*3*4
and
2! means 1*2
(P.S. 1! and 0! are both defined to be a 1.)

So
6C4 =
A lot of these factors cancel so we don't have to do very much multiplying to simplify:
6C4 =