2 number cubes are rolled what is the probability that the sum if the numbers rolled is either a 4 or a 10

With 2 cubes, there are 3 ways to roll a sum of 4 ... 1 and 3, 3 and 1, 2 and 2.

with 2 cubes, there are 3 ways to roll a sum of 10 ... 6 and 4, 4 and 6, 5 and 5.

total possible outcomes = (6 * 6) = 36

probability of this happening is 6/36 reduces to 1/6