Find the probability of rolling the difference of 3

Assuming that these are 6-sided dice, We can roll a 6 and a 3, and 5 and a 2, or a 4 and a 1, in order to get a difference of 3.

1/6 chance for each side, 1/36 to roll any one of those combinations.

Multiply that chance by 3, for the 3 combinations we can roll to give us a difference of 3, and we get 3/36, or an 8. (3) % reoccurring chance.

If it's a 6 sided die than it's 2/6 or 1/3