Question 728393
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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