1. The problem statement, all variables and given/known data A friend lays out three playing cards on a table, from a pack of 52. He tells you that one is definitely a queen and the other two are definitely spades. What is the probability that the middle card is the queen of spades? 2. Relevant equations 3. The attempt at a solution The probability that the queen is the queen of spades is 1/4. The probability that either of the spades is the queen of spades is 1/13. So the probability that any of the three cards is the queen of spades is...? This isn't a homework problem. I just made it up to help me fall asleep, but now I can't figure it out.