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Justify your answers and detail your calculations briefly.  Answers should be brief and well described.Please check the file Question 4:In an article about the cost of health care, Money magazine reported that a visit to a hospi-tal emergency room for something as simple as a sore throat has a mean cost of $328(Money, January 2009). Assume that the cost for this type of hospital emergency room visitis normally distributed with a standard deviation of $92. Answer the following questionsabout the cost of a hospital emergency room visit for this medical service.a. What is the probability that the cost will be more than $500?b. What is the probability that the cost will be less than $250?c.What is the probability that the cost will be between $300 and $400?

  
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