Answer
[Red and Red, Red and White, Red and White]
Work Step by Step
There are $2$ red marbles and $1$ white marble, and the marbles are taken $2$ at a time.
So the sample space would be:
[Red and Red, Red and White, Red and White]
The person could take out $2$ red marbles, or he could take out the white marble and one of the red marbles, or he could take out the white marble and the other one of the red marbles.
