So it's essentially, there are going to be, out of 6 flips, I'm choosing, as the god of probability, 4 to be heads. So that's the number of combinations, the number of unique combinations, where you have 4 out of 6 heads, times the probability of each of the combinations, which is 1 half to the 6th power. Well, let's 6 choose 4. That's 6 factorial over 4 factorial times 6 minus 4 factorial, so that's 2 factorial. And that's times 1 half to the 6th. And I'll switch colors again, just to stop the monotony. And that equals, let's see, 6 times 5 times 4 times 3 times 2, we don't have to write the 1 times 1, I'll do it anyway.