document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=170096>Question 170096</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ratio and Proportion \r<BR>\n" );
document.write( "\n" );
document.write( "2. 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. \r<BR>\n" );
document.write( "\n" );
document.write( "This problem has me totally confused!  Again, I am not good a word problems.  I never know where to start, I have been trying to work out the problem, but I don't know where to begin.  Please help me! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #125541 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=125541\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 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. <BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "Use a proportion:<BR>\n" );
document.write( "[9 infected/15 sampled] = [x infected/all the PCs]\r<BR>\n" );
document.write( "\n" );
document.write( "(9/15) = (x/202)<BR>\n" );
document.write( "x = 202(9/15)\r<BR>\n" );
document.write( "\n" );
document.write( "x = 202(3/5)<BR>\n" );
document.write( "x = 121.2<BR>\n" );
document.write( "Round down to get x = 121 infected PC's out of 202<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );