1. A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service for the fleet of cars is bell-shaped and has a mean of 55 months and a standard deviation of 10 months. Using the empirical rule (as presented in the book), what is the approximate percentage of cars that remain in service between 65 and 85 months?
2. The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 42 and a standard deviation of 4. Using the empirical rule (as presented in the book), what is the approximate percentage of lightbulb replacement requests numbering between 42 and 54?

3.Consider the following information about a group of 130 FCC students:

Gender Right-handed Left-handed Total

Female 43 17 60

Male 52 18 70

Total 95 35 130

If one person is randomly selected from the group, what is the probability that this student is male or right-handed?