# The average age of a college professor is normally distributed with a mean of 40 years and a standard deviation of 8 years. What is the probability that a teacher is older than 50?

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There are 6 professors. What is the probability that their average age is greater than 50?

What age cuts off the oldest 10% of the staff?

There are 6 professors. What is the probability that their average age is greater than 50?

What age cuts off the oldest 10% of the staff?

##### 1 Answer

Mar 14, 2018