So if you were to somehow know that your coin is unfair, what is the probability of getting two heads in a row? Well, in this unfair coin, it has a 60% chance of coming up heads. So it will be equal to 0.6 times 0.6, which is 0.36. So if you have an unfair coin, if you know for a fact that you have an unfair coin, if that is a given, you have a 36% chance of getting two heads in a row. Now, if you want to know the probability of this whole series of events, the probability that you picked an unfair coin and you get two heads in a row, so the probability of unfair and two heads in a row, given that you had that unfair coin, you would multiply this 3 8ths times the 0.36. So this will be equal to the 3 8ths times 0.36. And so let's get a calculator out and calculate these.