document.write( "Question 203114: A new virus is released on the internet; the administrator of a department's Local Area Network (LAN) is given five minutes by a manager to estimate the impact. The administrator samples 12 of the PCs connected to the LAN and finds that 7 are infected. Use a proportion to estimate the number of infected PCs if there are a total of 216 PCs connected to the LAN. \n" ); document.write( "
Algebra.Com's Answer #153246 by rfer(16322)\"\" \"About 
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7/12:x/216
\n" ); document.write( "cross multiply
\n" ); document.write( "12x=7*216
\n" ); document.write( "12x=1512
\n" ); document.write( "x=126 infected
\n" ); document.write( "
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