1. Possible chances: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19; Probability is 10/20 = 1/2 2. Possible events: 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11; Probability is 14/20 = 7/10 Solution 1. Possible chances: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19; Probability is 10/20 = 1/2 2. Possible events: 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11; Probability is 14/20 = 7/10.