Biology, 15.11.2019 21:31 SDFGHJKdd

The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution, with the mean of 17 minutes and a standard deviation of 2 minutes.

a) the automotive center guarantees customers that the service will take no longer than 20 minutes. if it does take longer, the customer will receive the service for half-price. what percent of customers receive the service for half-price?

b) if the automotive center does not want to give the discount to more than 2% of its customers, how long should it make the guaranteed time limit?

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