What is the probability of rolling a sum that is a multiple of 4 or a set of doubles with two number cubes?

Total possibilities with one cube = 6.

Total possibilities with two cubes = 6 x 6 = 36.

Possible multiples of 4 = 8 possibilities:

1 - 3

2 - 2

2 - 6

3 - 1

3 - 5

4 - 4

5 - 3

6 - 2

Doubles not already included = 3 possibilities:

3 - 3

5 - 5

6 - 6

Total possible successes = 8 + 3 = 11 .

Probability of success = 11/36 = 30.6%(rounded)