Quiz

In a recent poll, Americans were asked how many hours per week they watched television.  Below are the results of the survey:

Hours Per Week                Frequency

     0 - 9                                       180

    10 - 19                                    220

    20 - 30                                    660

    31+                                         450

If this survey accurately reflects the general population, find the probability that a randomly selected American watches more than 19 hours of television per week.