Answer:
There are six faces for each of two dice, giving 36 possible outcomes. If the two dice are fair, each of 36 outcomes is equally likely.
So far only 3 outcomes sum to 4 which are (1+3), (2+2) and (3+1).
Probability of getting a sum of 4 on one toss of two dice is 3/36, or 1/12.
(note since there isn't a specific # of sides I'm using 6.)
1/12
