Probability is total desired outcomes over total possible outcomes.
6 outcomes on die #1: 1, 2, 3, 4, 5, 6
6 outcomes on die #2: 1, 2, 3, 4, 5, 6
6 x 6 = 36 possible outcomes.
How many ways to make 8? 2,6; 6,2; 3,5; 5,3; 4,4; 4,4
Remember, each pair is different since there are two dice.
Therefore, 8/36 probability of rolling an 8.