The Pew Internet & American Life Project compiles data on smartphone ownership and publishes the results in

Question:

The Pew Internet & American Life Project compiles data on smartphone ownership and publishes the results in the document Smartphone Ownership. The first two columns of the following table provide a percentage for age of U.S. adults. The third column of the table shows the percentage of people in each age group who own a smartphone.

Suppose that a U.S. adult is selected at random. Determine the probability that the person selected
a. Owns a smartphone, given that he or she is between 18 and 24 years old.
b. Owns a smartphone
c. Is between 18 and 24 years old, given that he or she owns a smartphone.
d. Interpret your answers in parts (a)-(c) in terms of percentages.

Distribution
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