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One year consumers spent an average of $23 on a meal at a restaurant. Assume that...

One year consumers spent an average of $23 on a meal at a restaurant. Assume that the amount spent on a restaurant meal is normally distributed and that the standard deviation is $6.

What is the probability that a randomly selected person spent between $9 and $21?

P($9<X<$21)=? (Round to four decimal places as​ needed.)

​

Math   Statistics-And-Probability   
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