The sample space of number cube 1 = {1,2,2,3}
The sample space of number cube 2 = {1,3,4,5}
X is the product of the numbers on both cube
The probability distribution (sample space or possible outcomes) from the product of both number cubes is shown below;
Therefore, the probability distribution for X from the table above is;
X = { 1,2,2,3,3,4,5,6,6,8,8,9,10,10,12,15}