Thank you for your explanation! So was this an example of a combination or of permutaion? I tried both formulas:

**Combination = n! / (n - r)! r!**

**Permutation = n! / (n - r)!**

But neither gave the answer you found. I was using:

**n = 10**

**r = 3**

Is that correct? If so, was I just calculating incorrectly? Doesn't 10! = 10 x 9 x 8 x 7 x 6 ... x 1?

Thank you for your help so far! I am trying to learn more about the math behind statistics and have been havign some trouble!