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#8 8. (4 points) SHOW ALL YOUR WORK!!! During certain time periods at a grocery store on Fridays, cus- tomers arriving at the cash register

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8. (4 points) SHOW ALL YOUR WORK!!! During certain time periods at a grocery store on Fridays, cus- tomers arriving at the cash register have waiting times that are uniformly distributed between 0 minutes and 12 minutes, find the probability that a randomly selected passenger has a waiting time of at most 7 minutes. (work with uniform distribution density curve)

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