AnswersGeometryPractice TestQuestion 8
8
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Practice Test

Question 8 • Geometry

The manager of a grocery store reports that there is a 12 percent chance that a customer buys apples during a shopping trip, a 5 percent chance that a customer buy apples and carrots, and a 17 percent chance that a customer buys apples or carrots. What is the probability of a customer buying carrots?

Answer
A
10 point 0 percent
B
5 point 0 percent
C
1 point 4 percent
D
11 point 4 percent

Explanation

Use the addition rule: P(apples or carrots) = P(apples) + P(carrots) − P(apples and carrots). Substituting the percentages gives 17% = 12% + P(carrots) − 5%, so P(carrots) = 10%. The correct choice is 10.0 percent.

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