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Information from the Department of Motor Vehicles indicates that the average age of licensed drivers is = 45.7 years with a standard deviation of =

Information from the Department of Motor Vehicles indicates that the average age of licensed drivers is = 45.7 years with a standard deviation of = 12.5 years. Assuming that the distribution of drivers ages is approximately normal,

  • What proportion of licensed drivers are older than 50 years old?
  • What proportion of licensed drivers are younger than 30 years old?

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