There are 11 marbles in a bag: 3 are blue, 2 are white, and 6 are green. If one marble is drawn, what is the probability that it is either blue or green?

Answer 1

The probability of a blue marble being drawn is 3/11, since 3 marbles are blue and there are 11 total marbles. The probability of a green marble being drawn is 6/11, since 6 marbles are green and there are 11 total marbles.

To identify the probability of either a blue OR a green marble being drawn, add the two probabilities together.

3/11 + 6/11 = 9/11

So the probability of a blue or green marble being drawn in 9/11, since this fraction cannot be simplified.