SOLUTION: How do I solve the following problem? Evaluate C(7,3). Thank you.

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The equation for C is: .
C is used to find the coefficient in a binomial expansion.
Another way to look at this is that the formula finds the coefficient in the Pascal triangle that corresponds to the row at the third power. Just a faster way than writing out the Pascal triangle all the time.
This one goes like this:

The 6 and the 3*2 cancel out to give us:

Which is 35.