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.(4 points
The total number of marbles in the bowl is 120.
The number of red marbles in the bowl is the total number of marbles (120) minus the sum of the black marbles and white marbles, which is 80 + 28 = 108.
Therefore, the probability of Nicole pulling a red marble out of the bowl is:
Number of red marbles / Total number of marbles = 108 / 120 = 9 / 10 = 0.9
So, the probability of Nicole pulling a red marble out of the bowl is 0.9 or 90%.