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Due to random variations in the operation of an automatic coffee machine, not every cup is...

Due to random variations in the operation of an automatic coffee machine, not every cup is filled with the same amount of coffee. assume that the mean amount of coffee dispensed is 8 ounces and the standard deviation is 0.6. Using the 68-95-99.7 rule to complete the following.
A.) approximately ____% of cups should have less than 8 ounces.
B.) approximately ___% of cups should of less than 7.4 ounces.

Math   Statistics-And-Probability   
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