Of getting 4 out of 6 heads, given the unfair coin? Well, once again, what's the probability of each of the combinations where you get 4 out of 6? So in this situation, let's do the same one. Heads, tails, heads, tails, heads, heads. That's 4 out of 6 heads. But in this situation, it's not a 50% chance of getting heads, it's 80%. So it would be 0.8 times 0.2 times 0.8 times 0.2 times 0.8 times 0.8.