document.write( "Question 854023: According to a 2010 chicago sun times article, 20% of driver's license applicants fail the written test. If 200 people take the driver's license exam how many people would you expect to pass? \n" ); document.write( "

Algebra.Com's Answer #514420 by mathkitty(1) $\"\"$ $\"About$

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You can solve this problem using proportions. \r
\n" ); document.write( "\n" ); document.write( "If you had 20% of all particpants and 200 taking it, you can set up your proportion like this:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " x 20
\n" ); document.write( "---- = ------
\n" ); document.write( "200 100\r
\n" ); document.write( "\n" ); document.write( "The 20/100 represents the percent.\r
\n" ); document.write( "\n" ); document.write( "Cross multiply \r
\n" ); document.write( "\n" ); document.write( "100x = 20 x 200\r
\n" ); document.write( "\n" ); document.write( "Divide by 100 to get x alone.\r
\n" ); document.write( "\n" ); document.write( "100x/100 = 200 x 20/100\r
\n" ); document.write( "\n" ); document.write( "You would get 40 people who will fail the exam.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "To find out who will pass the exam, you simply subtract 200-40 and you would get 160 people will pass the test. \n" ); document.write( "

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