What is the sample space of the sum of two 6-sided die where the first number is less than 5?

When the first number is less than 5, the possible outcomes for the first die are 1, 2, 3, and 4.

For each of these outcomes, the possible outcomes for the second die are 1, 2, 3, 4, 5, and 6.

Therefore, the sample space for the sum of two 6-sided dice when the first number is less than 5 consists of the following outcomes:

2, 3, 4, 5, 6, 7
3, 4, 5, 6, 7, 8
4, 5, 6, 7, 8, 9
5, 6, 7, 8, 9, 10