document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1010639>Question 1010639</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Out of 40 children some pay Rs 5 each while the rest contribute Rs 10 for an excursion. If the total collection is Rs 320 how many gave Rs 5? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #626098 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52824)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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/cgi-bin/show-face.mpl?user=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=626098\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Out of 40 children some pay Rs 5 each while the rest contribute Rs 10 for an excursion. If the total collection is Rs 320 how many gave Rs 5?<BR>\n" );
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document.write( "One can solve the problem by reducing it to a system of two equations or to a single equation.\r<BR>\n" );
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document.write( "More elegant way is to use the common sense and mental math.\r<BR>\n" );
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document.write( "Let us assume for a minute that everybody contributed &nbsp;Rs 10. \r<BR>\n" );
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document.write( "Then the total collection would be &nbsp;40*10 = Rs 400, &nbsp;which is in &nbsp;RS 80 more than &nbsp;Rs 320.\r<BR>\n" );
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document.write( "It is clear that the difference arose because some children payed  &nbsp;Rs 5 &nbsp;that we intently counted as &nbsp;Rs 10. \r<BR>\n" );
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document.write( "It is also clear that the number of those who payed &nbsp;Rs 5 &nbsp;is &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=80%2F%2810-5%29 ALIGN=MIDDLE  ALT=\"80%2F%2810-5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=80%2F5 ALIGN=MIDDLE  ALT=\"80%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 16.\r<BR>\n" );
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document.write( "It gives the answer: &nbsp;16 children payed &nbsp;Rs 5 &nbsp;and &nbsp;40-16 = 24 &nbsp;payed &nbsp;Rs 10.\r<BR>\n" );
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document.write( "For more problems similar to this one see the lesson <A  rel=nofollow HREF=http://www.algebra.com/algebra/homework/word/misc/What-type-of-problems-are-these.lesson>What type of problems are these?</A> in this site.\r<BR>\n" );
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