An executive drives from his home to his office in the city. The driving times are normally distributed with a mean of 35 minutes and a standard deviation of 8 minutes.
- In what percent of the days will it take him 30 minutes or less to drive to work?
- In what percent of teh days will it take 40 minutes or more to drive to work?
- How long will the longest 10 percent of the trips take?