document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=970486>Question 970486</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The ratio of girls to boys in Liza's classroom is 5 to 4. How many girls are in her classroom if there is a total of 27 students? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #854529 by </B><A HREF=/tutors/aboutme.mpl?userid=n2><B>n2(91)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=n2><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=854529\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "The ratio of girls to boys in Liza's classroom is 5 to 4. How many girls are in her classroom <BR>\n" );
document.write( "if there is a total of 27 students?<BR>\n" );
document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;It can be solved mentally without using equations.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "According to the problem, we can group the students in sets, each containing 5 girls and 4 boys.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Each such group has 5 + 4 = 9 students.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "So, the number of such groups is 27/9 = 3.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Thus, the number of girls in the class is 3*5 = 15.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>ANSWER</U>\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Solved.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "//////////////////////////////////\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "In normal teaching process, the students should learn this grouping method first,<BR>\n" );
document.write( "allowing to solve this problem mentally (at 4-th or 5-th grade).\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Later, in 6-th or 7-th grade, students will learn proportions and will solve such problems using proportions.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "But for normal mathematical development, students should learn the mental solution way first,<BR>\n" );
document.write( "using the grouping method.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );