document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=970780>Question 970780</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Determine the expected value of X. <BR>\n" );
document.write( "X| 2 | 4 | 5 | 7 | 10<BR>\n" );
document.write( "P|0.2|0.1|0.25|0.05|0.4 <BR>\n" );
document.write( "A. 5.6<BR>\n" );
document.write( "B. 5.95<BR>\n" );
document.write( "C. 6.25<BR>\n" );
document.write( "D. 6.4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #593418 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=593418\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Multiply each X value with its corresponding probability (P or P(X) value).\r<BR>\n" );
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document.write( "2*0.2 = 0.40<BR>\n" );
document.write( "4*0.1 = 0.40<BR>\n" );
document.write( "5*0.25 = 1.25<BR>\n" );
document.write( "7*0.05 = 0.35<BR>\n" );
document.write( "10*0.4 = 4.00\r<BR>\n" );
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document.write( "Then add up the products: \r<BR>\n" );
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document.write( "0.40+0.40+1.25+0.35+4.00 = 6.4\r<BR>\n" );
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document.write( "The expected value is <font color=\"red\">6.4</font>\r<BR>\n" );
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document.write( "Side Note: a compact way to state the formula (without much words) is to write <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE E(X) = \sum x*P(x)\">. </SPAN>\n" );
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