SOLUTION: An Adweek Media/Harris Poll revealed that 44% of US adults in the 18-34 years category think that "Made in America" ads boost sales. A different Harris Interactive poll showed t

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Question 728393: An Adweek Media/Harris Poll revealed that 44% of US adults in the 18-34 years category think that "Made in America" ads boost sales.
A different Harris Interactive poll showed that 78% of US adults in the 18-34 years category use social media online.
Suppose that 85% of US adults in the 18-34 years category think that "Made in America" ads boost sales or use social media online.
If a US adult in the 18-34 years category is randomly selected a.
What is the probability that the person thinks "Made in America" ads boost sales AND uses social media on-line &
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 on-line?
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Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A) 44% of US adults in the 18-34 years category think that "Made in America" ads boost sales.
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B) 78% of US adults in the 18-34 years category use social media online.
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Suppose that 85% of US adults in the 18-34 years category think that "Made in America" ads boost sales OR use social media online.
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If a US adult in the 18-34 years category is randomly selected
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a. What is the probability that the person thinks "Made in America" ads boost sales AND uses social media on-line &
Ans: P(A AND B) = P(A)+P(B)-P(A or B) = 0.44+0.78-0.85 = 0.37
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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 on-line?
P(A | B) = P(A and B)/P(B) = 0.37/0.78 = 0.4744
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Cheers,
Stan H.
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