We know that this is 0.6. Just like that, we've set up a situation, an equation where we can solve for the probability of B given A. The probability of B given A, notice, let me just rewrite it right over here. Actually, I'll write this part first. 0.6 times the probability of B given A, times that right over there, and I'll just copy and paste it so I don't have to keep changing colors. That over there is equal to 0.35. To solve for the probability of B given A, we can just divide both sides by 0.6.