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According to the Department of Education website, the average salary of teachers for the 2017 and 2018 school year was $52,728. Suppose that the distribution

According to the Department of Education website, the average salary of teachers for the 2017 and 2018 school year was $52,728. Suppose that the distribution of salaries is normal with a standard deviation of $9000. What is the probability that a randomly selected teacher makes less than $40,000 per year?

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