document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1159131>Question 1159131</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The mean of four numbers is 25.  Three of the numbers are 15, 36, and 20.  What is the fourth number </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #782152 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=782152\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "Of course you can use the formal definition of mean to write and solve an equation to solve the problem.<br><BR>\n" );
document.write( "If that kind of formal solution method is not required, there are other ways that can get you to the answer faster and with less work.  Here is my preferred method.<br><BR>\n" );
document.write( "The 1st number is 10 short of the mean.<BR>\n" );
document.write( "The second number is 11 over the mean.<BR>\n" );
document.write( "The third number is 5 short of the mean.<br><BR>\n" );
document.write( "Together, the first three numbers are 4 short of the mean.<br><BR>\n" );
document.write( "That means the fourth number is 4 over the mean.<br><BR>\n" );
document.write( "ANSWER: 25+4 = 29<br><BR>\n" );
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