A bag contains 8 green marbles, 16 red marbles, 3 white marbles, and 3 black marbles. What is the probability of drawing a white marble out of the bag?

There is a 10% (1/10) chance of drawing a white marble out of the bag.

Altogether, there are 30 marbles in the bag (8 + 16 + 3 + 3 = 30)

3 of the marbles are white. That makes the probability of drawing a white marble 3 out of 30, or 1/10 or 10%.