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The time that customers take to complete their transaction at a money machine is a random variable with mean = 2 minutes and standard deviation = 0.6 minute. Find the probability that a random sample of 50 customers will take between 90 and 112.5 minutes to complete all their transactions. That is, find the probability that will be between 1.8 and 2.25 minutes.

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Category:- Statistics and Probability
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