The frequency distribution from Example 7 is shown below. Find the probability of randomly selecting a social networking site user who is not 23 to 35 years old.

Data from Example 7

A company is conducting a phone survey of randomly selected individuals to determine the ages of social networking site users. So far, 975 social networking site users have been surveyed. The frequency distribution at the right shows the results. What is the probability that the next user surveyed is 23 to 35 years old?

Ages Frequency, f 18 to 22 156 23 to 35 312 36 to 49 254 50 to 64 195 65 and over 58 f=975