8) Herman pulls a colored marble out of a bowl, choosing the marble at random. There are 100 marbles in the bowl, 40 of which are black, 10 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. (3 points)
To calculate the probability of pulling a red marble out of the bowl, we first need to determine how many red marbles are in the bowl.
Total number of marbles = 100
Number of black marbles = 40
Number of white marbles = 10
Number of red marbles = Total number of marbles - Number of black marbles - Number of white marbles
Number of red marbles = 100 - 40 - 10
Number of red marbles = 50
So, out of the 100 marbles in the bowl, 50 are red.
Probability of pulling a red marble = Number of red marbles / Total number of marbles
Probability of pulling a red marble = 50 / 100
Probability of pulling a red marble = 0.5 or 50%
Therefore, the probability that Herman will pull a red marble out of the bowl is 0.5 or 50%.