document.write( "Question 153015: 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 15 of the PCs connected to the LAN, and finds that 9 are infected; use proportion to estimate the number of infected PCs if there are a total of 202 PCs connected to the LAN. \n" ); document.write( "

Algebra.Com's Answer #112675 by jojo14344(1513) $\"\"$ $\"About$

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If to be based on 15 sample PC which 9 are infected, it follows:
\n" ); document.write( " $\"9%2F15\"$ ---------> $\"cross%289%293%2Fcross%2815%295=3%2F5\"$
\n" ); document.write( "For every 5 PC, 3 are infected by proportion.
\n" ); document.write( " $\"%283%2F5%29100\"$ =60% of the PC are with virus.
\n" ); document.write( "So if there are 202 in total:
\n" ); document.write( " $\"%28202%29%2860%2F100%29=202%2A0.60=121.2\"$
\n" ); document.write( "Conclusion: Estimated infected about 121 PCs
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo \n" ); document.write( "

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