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Situation A: On a particular airline, passengers traveling on the daily flight from St. Louis to...

Situation A: On a particular airline, passengers traveling on the daily flight from St. Louis to Albuquerque must change planes in Denver. Suppose that their waiting times in Denver range from 20 to 45 minutes, following a uniform probability distribution.

A:  Find the probability that passengers on this flight would wait at least 30 minutes in Denver

B: There is an 80% probability that their waiting time in Denver will be __________ minutes or less.

Math   Statistics-And-Probability   
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TOPIC:Uniform distribution.

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