12. (Topic I.6) There are 12 face cards (kings, queens, and jacks) in a standard 52 card deck. Assume that the deck is well shuffled, and that two cards are dealt from the deck with the first card not replaced before the second is dealt. What is the probability that exactly one of the cards dealt is a face card?

13. (Topic I.7) Referring to the same experiment as in Question 12, let X be the number of face cards that come up among the two cards dealt. Calculate the mean, , of the random variable X. Show your work or explain your answer otherwise.