Question
a popular retail store knows that the purchase amounts by its customers is a random variable that follows a normal distribution with a mean of
a popular retail store knows that the purchase amounts by its customers is a random variable that follows a normal distribution with a mean of $30 and a standard deviation of $9.
What is the probability that a random selected customer will spend $20 or more at this store?
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High School Math 2012 Common-core Algebra 2 Grade 10/11
Authors: Savvas Learning Co
Student Edition
9780133186024, 0133186024
