Mathematics, 18.03.2021 04:40, evaeh

A plumber charges fixed fee of $35 and $40 per hour. Out of 20 jobs mean is 2.75 and standard deviation is 1.5. What is mean and standard deviation of the charges

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A plumber charges fixed fee of $35 and $40 per hour. Out of 20 jobs mean is 2.75 and standard deviat...