Use the Empirical Rule to Solve the Problem

question 41

Multiple Choice

Use the empirical rule to solve the problem.
-The amount of Jen's monthly phone bill is normally distributed with a mean of $78 and a standard deviation of $9. What percentage of her phone bills are between $51 and $105?

• A)68%
• B)95%
• C)99.7%
• D)99.99%

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