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(a) not show up for their flight. If the airline sells 181 tickets for a flight that only has seats for 175 passengers, estimate the probability that everyone who shows up for this flight will get a seat. (Use the continuity correction) (b) The amount of time that a bank teller spends dealing with a random customer follows an exponential distribution with a mean of 5 minutes. Estimate the probability that the total amount of time that the teller spends dealing with 40 customers is under 3 hours. 5- Suppose that in the long run, 5% of ticket holders with a certain airline do

math   Statistics-And-Probability   
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Answer #1

5a. We used standard normal table.

5b. The concept the sum of independent exponential distribution follows a gamma distribution.

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