Step 1 : Introduction to the question "What is the average number of Facebook friends in the network of an adult user?"
...Facebook is universally recognized as the dominant social networking platform. From adults to teens and younger, Facebook use continues to grow and shows no real sign of diminishing. The number of friends found in a particular user's network varies greatly by age. Adult Facebook users, on average, have 338 friends listed in their networks. The median number of friends in a network for an adult user is 200. Facebook users aged 18-29 have an average of more than 500 friends in their networks. Older user aged 65 and over generally have 100 friends or fewer. Source: PewResearch.org