A bag contains 6 green marbles, 9 red marbles, 7 white marbles, and 3 black marbles. What is the probability of drawing a red marble out of the bag?

A. 1/18

B. 9/16

C. 9/25

D. 1/4

The answer is C. 9/25.

There are in total 25 marbles:

6 green + 9 red + 7 white + 3 black = 25 marbles.

There are 9 red marbles of the total 25 marbles. You can draw 9 red Thus, the probability of drawing a red marble out of the bag is 9 out of 25, which is 9/25.