What is the probability of getting difference 2 with two dice?

The total number of ways to obtain the certain difference is 36. The number of ways of obtaining the difference of 2 with two dice is 8. How? List the possibilities of obtaining the difference of 2 with two dice:

1. 3 and 1
2. 4 and 2
3. 5 and 3
4. 6 and 4

These are 4 pairs of numbers to obtain a difference 2. Make note that we can also have the difference of two with these numbers "reversed". Then, we have 8 ways of obtaining the difference of 2. Therefore, the probability of obtaining the difference of 2 with two dice is 8/36.