How many outcomes are there in the sample space for rolling 2 dice?

Assuming there are 6 sides on the dice, then there are 36 different outcomes

The 36 comes from the result of 6*6 = 36

If you want, you can draw out a table that has 6 rows and 6 columns. There will be 36 cells which are the results of adding any two combinations of the two dice.