A Nielsen survey of teens between the ages of 13 and 17 found that 83% use text

Question:

A Nielsen survey of teens between the ages of 13 and 17 found that 83% use text messaging and 56% use picture messaging (“How Teens Use Media,” Nielsen, June 2009). Use these percentages to explain why the two events T = event that a randomly selected teen uses text messaging and P = event that a randomly selected teen uses picture messaging cannot be mutually exclusive.