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3. An executive at Westinghouse drives from his home to his office. The driving times are...

3. An executive at Westinghouse drives from his home to his office. The driving times are normally distributed with a mean of 50 minutes and standard deviation of 10 minutes.

• In what percent of the days will it take him 40 minutes or less to drive home.

• In what percent of the days will it take between 30 and 55 minutes to drive home.

Math   Statistics-And-Probability   
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