The probability that a randomly selected customer selected pepperoni but not mushrooms is: 1/2.
Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true.
How to solve?
First, find how many customers there were:
20 + 12 + 8
= 40
20 customers selected pepperoni only, so to find the probability that they chose pepperoni but not mushrooms, divide the amount by the total:
20/40
= 1/2
So, the probability is 1/2
Learn more about Probability:
brainly.com/question/13604758
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