An Ad week Media/Harris Poll revealed that 44% of U.S. adults in the 18–34 years category think that “Made in America” ads boost sales. A different Harris Interactive poll showed that 78% of U.S. adults in the 18–34 years category use social media online. Suppose that 85% of U.S. adults in the 18–34 years category think that “Made in America” ads boost sales or use social media online. If a U.S. adult in the 18–34 years category is randomly selected.
a. What is the probability that the person thinks that “Made in America” ads boost sales and uses social media online?
b. What is the probability that the person thinks that “Made in America” ads boost sales given that the person does not use social media online?
Solution:
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