Nicole pulls a colored marble out of a bowl, choosing the marble at random. There are 120 marbles in the bowl, of which 80 are black, and 28 are white, and the rest are red. Use words and numbers to describe the probability that she will pull a red marble out of the bowl.

Answer 1

There are 120 marbles in the bowl, and 80 of them are black, and 28 are white. This means that the number of red marbles is:

120 - 80 - 28 = 12

So there are 12 red marbles in the bowl. Since Nicole is choosing a marble at random, the probability of her selecting a red marble is:

number of red marbles / total number of marbles

or

12 / 120

Simplifying this fraction gives:

1 / 10

So the probability of Nicole pulling a red marble out of the bowl is 1/10 or 0.1.