Which of the following BEST addresses the addition rule of probability?
A) What are the chances my checkout line in the grocery store will be the slowest?
B) Am I more likely to be in an automobile accident or a plane crash?
C) What is the likelihood of talking a policeman out of giving you a speeding ticket?
D) What are my chances of my test score being in the top third of the class?

Question

Quizplus · Accepted Answer

The addition rule of probability states that the probability of either A or B occurring is equal to the sum of the probability of A occurring plus the probability of B occurring, minus the probability of both A and B occurring. Choice D addresses this rule by asking about the probability of being in the top third of the class, which is a case of mutually exclusive events (either you are in the top third or you are not), making it appropriate for the addition rule. Choices A, B, and C do not pertain to mutually exclusive events, so they do not relate to the addition rule of probability.

Which of the Following BEST Addresses the Addition Rule of Probability