In a deck of playing cards, take out four cards of hearts 2, 3, 4 and 5. After washing evenly, Xiao Ming randomly draws a card and writes the numbers on it.

Hearts 2 hearts 3 four of hearts hearts 5 hearts 2 2, 2 2, 3 2, 4 2, 5 hearts 3 3, 2 3, 3 3, 4 3, 5 four of hearts, 2 4, 3 4, 4 4, 5 hearts 5 5, 2 5, 3 5, 4 5, 5-* * There are 65,438+06 species.

(2) Number pairs (2,3) and (3,2) are the solutions of the equation x+y=5, so P (sum equals 5) = 2 16 = 18.