Twelve children play musical chairs. If there are three chairs, how many ways are there for three children to sit?

220

12!/6

1,320

660

For the answer to the question above, It's s imple. Just figure the first chair. There's obviously 12 ways that could go. Then, with one kid out, there are 11 ways for the second chair. Then 10 ways for the third. So, you get 12x11x10 possible combinations. So the answer is 1320