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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)
To find the probability of Nicole pulling a red marble out of the bowl, we first need to determine the number of red marbles in the bowl.
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 = 120 - 108
Number of red marbles = 12
The probability of pulling a red marble can be calculated as follows:
Probability of pulling a red marble = Number of red marbles / Total number of marbles
Probability of pulling a red marble = 12 / 120
Probability of pulling a red marble = 1 / 10
Therefore, the probability that Nicole will pull a red marble out of the bowl is 1/10 or 0.1.
could you write a bit shorter?
To find the probability of Nicole pulling a red marble out of the bowl:
Total red marbles = 120 - (80 black + 28 white) = 12
Probability = Number of red marbles / Total marbles = 12/120 = 1/10 = 0.1
Hence, the probability of Nicole pulling a red marble is 0.1 or 1/10.