Question

Use common sense to determine whether the given event is impossible; possible, but very unlikely; or possible and likely. When Dave picked two marbles from a bag containing one red, one blue, and one yellow marble, he got two marbles of the same color. (Assume that he didn't replace the first marble before picking the second).

Answer 1

Impossible. It says there are one red, one blue, and one yellow. So there is no way he can grab two of the same color. That would mean grabbing two red, or two blue, or two yellow. But there are only one of each. So it's either Impossible or Dave is a magician.

Answer 2

That is impossible because there is only one of each color. The possible combinations he could have picked would be:
1 red, 1 blue
1 blue, 1 red
1 red, 1 yellow,
1 yellow, 1 red,
1 blue, 1 yellow,
and 1 yellow, 1 blue.
So, it would be impossible. Hope this helped!