Many everyday decisions, like who will drive to lunch or who will pay for coffee, are made by the toss of a (presumably fair) coin and using the criteria "heads, you will; tails, I will". This criterion is not quite fair, however, if the coin is biased (perhaps due to slightly irregular construction or wear). John von Newmann suggested a way to make perfectly fair decisions, even with a possibly biased coin. If a coun, biased so that P(h) =0.4600 and P(t)=0.5400, is tossed twice, find the probability of P(th).