document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1143742>Question 1143742</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many boys are there in a group of 27 students if there are four-fifths as many girls as there are boys? <BR>\n" );
document.write( "A)8<BR>\n" );
document.write( "B)10<BR>\n" );
document.write( "C)12<BR>\n" );
document.write( "D)15 </SPAN>\n" );
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document.write( "Given that there are 4/5 as many girls as boys, you can treat the \"4/5\" as a ratio -- girls:boys = 4:5.  So use the general procedure for setting up a problem involving ratios:<br><BR>\n" );
document.write( "let 4x = # of girls<BR>\n" );
document.write( "let 5x = # of boys<br><BR>\n" );
document.write( "Then<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x%2B5x+=+9x+=+27 ALIGN=MIDDLE  ALT=\"4x%2B5x+=+9x+=+27\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+3 ALIGN=MIDDLE  ALT=\"x+=+3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The number of boys is 5x = 5(3) = 15. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );