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, 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. Show your work.

1 answer

The total number of marbles in the bowl is 120.
Out of the 120 marbles, 80 are black, 28 are white, and the rest are red.

To find the probability of pulling a red marble, we need to determine the number of red marbles in the bowl.

Number of red marbles = Total number of marbles - (Number of black marbles + Number of white marbles)
Number of red marbles = 120 - (80 + 28)
Number of red marbles = 12

Therefore, there are 12 red marbles in the bowl.

The probability of pulling a red marble out of the bowl can be calculated as follows:
Probability = Number of red marbles / Total number of marbles
Probability = 12 / 120
Probability = 1 / 10

So, the probability that Nicole will pull a red marble out of the bowl is 1/10 or 0.1.