Question

Suppose you roll two dice find the number of elements in the event space of rolling a sum of 10

Answer 1

The event space is the list of all the different ways
that two dice could come up with a sum of 10.

Here they are:

Cube-A Cube-B
6 4
4 6
5 5

That's all the ways there are to roll a 10.
I am surprised.

These three combinations are all the elements
there are in that event space.