Solution-Parked for what maximum amount of time

Parked for what maximum amount of time

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Reference no: EM132188479

For the Seashell gas station in your? neighbourhood, records indicate that the number of customers arriving in any? 5-minute interval averages 0.94? customers, with a standard deviation of 0.97 customers. ? Sixty-five (65) percent of the customers use a credit card to pay for their purchase. There are 8 pumps at this service station. The time that a car is parked at a pump is normally distributed with a mean of 6.35 minutes and a standard deviation of 2.10 minutes. All the above activities are independent of each other.

?a) Ninety-four (94) percent of the customers will be parked for what maximum amount of time? (Use 2 decimal places? rounded.)?

nothing

minutes

?b) For 12 randomly selected? customers, what is the probability that at least 10 of them will pay using a credit? card? ? (Use 4 decimal places?rounded.) nothing

?c) What is the probability that more than 5 customers will arrive in a? 15-minute period?

nothing

(Use 4 decimal places? rounded.)

?d) What is the probability that the average parked time for the next 40 customers is less than 6? minutes?

nothing

(Use 4 decimal places? rounded.)

Reference no: EM132188479

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Parked for what maximum amount of time

Reference no: EM132188479

Reference no: EM132188479

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