In driving from Columbia to Tulsa, several different routes can be taken:
• Route A was calculated as taking 7 hours with a standard deviation of one-half hour.
• Route B was calculated as taking seven and one-half hours with a standard deviation of one-quarter hour.
a. What is the probability (expressed in percent) that the trip can be completed in less than seven and one-half hours on route A?
b. What is the probability (expressed in percent) that the trip can be completed in less than seven and one-half hours on route B?
c. What is the probability (expressed in percent) that the trip will take more than seven and threequarters hours on route A? on route B?
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