Okay, our teacher always gives a "little" help with whatever we're learning and then throws homework at us. I'm pretty sure I get the Permutation, but the Combination is so confusing! The problems seem so simple, but I just can't do it.

Just to check if I'm doing this right, is this correct?

12P6 = 665,280

And, I'm pretty sure I did that right.

But just changing the P to a C has confused me, because it's not possible for me to do it the was I am with combination.

This is the problem:

12C6

I have no clue what to do, because I've tried doing it like permutation with the factorial stuff. (Ex: 4!/2! = 4*3*2*1/2*1), but I'm really not sure. I keep kinding on websites that the answer is 924, but I don't know how they got that.