He pew internet and american life project finds that 95% of teenagers (ages 12–17) use the internet and that 81% of online teens use some kind of social media. of online teens who use some kind of social media, 91% have posted a photo of themselves. state: what percent of all teens are online, use social media, and have posted a photo of themselves? plan: express the information we are given in terms of events and their probabilities. if ={the teen is online}, ={the teen uses social media}, and ={the teen has posted a picture of herself}, what are the given probabilities?