# Probability Study Questions

A study by the National Park Service revealed that 50 percent of vacationers going to the Rocky Mountain region visit Yellowstone Park, 40 percent visit the Tetons, and 35 percent visit both.

a. What is the probability a vacationer will visit at least one of these attractions?

b. What is the probability .35 called?

c. Are the events mutually exclusive? Explain.

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#### Solution Preview

Hello

A study by the National Park Service revealed that 50 percent of vacationers going to the Rocky Mountain region visit Yelloestone Park, 40 percent visit the Tetons, and 35 percent visit both.

Probability that vacationer visits Yelloestone Park P(Y) = 50% or 0.5

Probability that vacationer visits Tetons P(T) = 40% or ...

#### Solution Summary

This solution calculates the probability that a vacationer visits at least on of these attractions, it discusses the meaning of the 35% and explains why the events are not mutually exclusive.