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The average cholesterol content of a certain brand of egg is 215 milligrams and the standard...

The average cholesterol content of a certain brand of egg is 215 milligrams and the standard deviation is 15 milligrams. Assume the variable is normally distributed.

a) If a single egg is selected, what is the probability that the cholesterol content will be between 200 and 218 milligrams?

b) If a sample of 20 eggs is selected, what is the probability the mean of the sample will be greater than 200 milligrams?

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