One last question- 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.
The total number of marbles in the bowl is 120.
There are 80 black marbles, 28 white marbles, so the number of red marbles is 120 - 80 - 28 = 12.
Therefore, the probability that Nicole will pull a red marble out of the bowl is 12/120 = 1/10 = 0.1 or 10%.
could you show how you got the answer step by step?
Of course!
Step 1: Calculate the total number of red marbles
Total number of marbles = 120
Number of black marbles = 80
Number of white marbles = 28
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
Step 2: Calculate the probability of selecting a red marble
Probability = Number of red marbles / Total number of marbles
Probability = 12 / 120
Probability = 1 / 10
Probability = 0.1 or 10%
Therefore, the probability that Nicole will pull a red marble out of the bowl is 0.1 or 10%.