Now to think about this, let's think about how many different possible ways we can get 4 flips of a coin. We're going to have 1 flip, then another flip, then another flip, then another flip. And this first flip has 2 possibilities, it could be heads or tails. The second flip has 2 possibilities. It could be heads or tails. The third flip has 2 possibilities, it could be heads or tails. And the fourth flip has 2 possibilities.