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So far this year, the average check total during dinner service at a restaurant is $52,...

So far this year, the average check total during dinner service at a restaurant is $52, with a standard deviation of $11.

To reach a sales goal, the next 25 checks during dinner service must average at least $50 each. What is the probability this restaurant reaches its sales goal? Write your answer as a decimal rounded to three places.

Math   Statistics-And-Probability   
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Answer #1

Ans :

Let x be the check total.

mean check ,standard deviation , sample size n= 25.

now

  

  

  

  

  

  

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