# math

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If the hourly sales at a certain register in a supermarket are normally distributed with a mean of \$650 and a standard deviation of \$60, find the probability that the sales during a randomly selected hour are greater than \$800.

• math -

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score above.

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