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3. Arizona Water Company mentions that the average water bill is $900 per year. Assume that the amount of billing follows an exponential distribution. a.

3. Arizona Water Company mentions that the average water bill is $900 per year. Assume that the amount of billing follows an exponential distribution.

a. Estimate the Probability that the randomly chosen customer would spend more than $600.

b.Esitmate the Probability that a randomly chosen customer would spend more than the average water bill cost.

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