Find probability-random sample will complete transactions

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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.

Reference no: EM13114229

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