Question

In how many ways can four aces be drawn from a deck of cards? (Order is not important.)

Answer 1

Let's imagine that we have in the deck 52 cards. So what we need to do is to make a kind of "progression".So let me explain this by doing the procedure. we can use is like this:
4/52 * 3/51 * 2/50 * 1/49 =
24 / 6497400 =
1 / 270725
3.694e-6