Question: Your friend John says: "Let toss coins. Each time I'll toss first and then you. If either coin comes up heads, I win. If neither, you win." You say, "There are three possibilities. You may get heads first and the game ends there. Or you may get tails and I get heads, or we may both get tails. In two of the three possible cases, you win." "Right," says your friend, "I have two chances to your one. So I'll put up $2 against $1." Is this a fair bet?