document.write( "Question 387979: Information from the Department of Motor Vehicles
\n" ); document.write( "indicates that the average age of licensed drivers is
\n" ); document.write( "U= 39.7 years with a standard deviation of
\n" ); document.write( "O= 12.5 years. Assuming that the distribution of
\n" ); document.write( "drivers’ ages is approximately normal,
\n" ); document.write( "a. What proportion of licensed drivers are more than
\n" ); document.write( "50 years old?
\n" ); document.write( "b. What proportion of licensed drivers are less than
\n" ); document.write( "30 years old?
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