But I also want to give you the intuition again for the formula. So in general, we said n choose k, that is equal to n factorial over k factorial times n minus k factorial. So in this situation, it would be, that would equal 8 factorial over 3 factorial times what? 8 minus k times 5 factorial. Or another way of writing this, this would be 8 times 7 times 6 times 5 times 4 times 3 times 2 times 1 over, I'll just write 3 factorial for a second, then times 5 times 4 times 3 times 2 times 1. And of course, that and that cancel out. And all you're left with is 8 times 7 times 6 over 3 factorial.