The number of all possible outcomes is 12*12 = 144. It is the number of all pairs (a,b) with integers "a" and "b" from 1 to 12 inclusive. The favorable pairs are (1,9), (2,8), (3,7), (4,6), (5,5), (6,4), (7,3), (8,2) and (9,1). The number of favorable pairs is 9. The probability under the question is P == . ANSWER