Answer to Question #54323 in Statistics and Probability for Rhys

Question #54323

A car manufacturer takes an average of 17.5 hours to construct a car. This includes time for stamping, welding, painting, assembly and inspections. Construction times vary with a standard deviation of 30 minutes and these times follow a normal distribution. Show your working, including an appropriate diagram. (You can simply paste a photo of the diagram into your solution).
Question: What is the probability that a randomly selected car manufactured at this plant takes between 18 and 19 hours to construct?

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