George flips two coins. He believes that both have a fifty-fifty chance of landing heads, and that the results of the flips are irrelevant to one another given his background state of information. The...

George flips two coins. He believes that both have a fifty-fifty chance of landing heads, and that the results of the flips are irrelevant to one another given his background state of information. The clairvoyant tells George that at least one of the coins has landed heads. What probability should George then assign to the other coin landing heads?

a. 1/4

b. 1/3

c. 1/2

d. You do not have enough information to solve this problem.