Salaries for teachers in an elementary school are normally distributed with a mean of $52,000 and a standard deviation of $4,500. A random sample includes fifteen teachers. What is the probability...

Salaries for teachers in an elementary school are normally distributed with a mean of $52,000 and a standard deviation of $4,500. A random sample includes fifteen teachers. What is the probability that the combined salary of teachers in the sample is over $800,000? Express your answer as a whole number percent.

Answer: 12.5 %

Now, Find the third quartile (75th percentile) for the average teacher salary in the sample.