document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=718098>Question 718098</A>: <I><SPAN STYLE=\"word-break: break-all;\"> . Find E(x), E(X2) and &#61555;2 for the probability function P(x) defined by the following table. (k is   constant)\r<BR>\n" );
document.write( "\n" );
document.write( "xi 	1	2	3	 -----	N<BR>\n" );
document.write( "P(xi)	k	2k	3k	 -----	N<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #440754 by </B><A HREF=/tutors/aboutme.mpl?userid=oscargut><B>oscargut(2103)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oscargut><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=oscargut><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=440754\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi,\r<BR>\n" );
document.write( "\n" );
document.write( "Can you check the table ?\r<BR>\n" );
document.write( "\n" );
document.write( "xi is from 1 to N  (that is right)\r<BR>\n" );
document.write( "\n" );
document.write( "But P(xi) is :  k,2k,3k......N  , can you check that N ??\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Is N or  Nk  ??\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "You can ask me more using this e-mail (mthman@gmail.com) or you can visit my site:\r<BR>\n" );
document.write( "\n" );
document.write( "http://www.online-maths-help.com/\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );