SOLUTION: In a certain city, 48% of all teenagers own a cellphone and 39% of all teenagers own a cellphone and a PSP. What is the probability that a teenager owns a PSP given that the teenag

Question 654380: In a certain city, 48% of all teenagers own a cellphone and 39% of all teenagers own a cellphone and a PSP. What is the probability that a teenager owns a PSP given that the teenager owns a cellphone?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In a certain city, 48% of all teenagers own a cellphone and 39% of all teenagers own a cellphone and a PSP. What is the probability that a teenager owns a PSP given that the teenager owns a cellphone?
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P(owns PSP | owns cellphone) = P(PSP AND cell)/P(cell) = 0.39/0.48 = 0.8125
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Cheers,
Stan H.
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