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The number of adult Internet users who take photos or videos they have found online and...

The number of adult Internet users who take photos or videos they have found online and post them on social media continues to increase. Looking at only adult Internet users, aged 18 and over, about 15% are 18-29 years old, another 26% are 30-49 years old, and the remaining 59% are 50 and over. The Pew Internet and American Life Project finds that 68% of Internet users aged 18-29 have posted photos or videos they have found online, along with 54% of those aged 30-49 and 26% of those 50 or older. Round your answers to two decimal places.  

a. What percent of adult Internet users post photos or videos they have found online?

b. What is the probability the user is aged 30-49 given that they post photos or videos they have found online?

This is a Bayes' Rule problem.

Math   Statistics-And-Probability   
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