document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=581222>Question 581222</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help I will pay for tutoring if I can get this answer right\r<BR>\n" );
document.write( "\n" );
document.write( "The number of times the SAT was taken and the number of students are as follow<BR>\n" );
document.write( "Number of times    Number of students<BR>\n" );
document.write( "1                        721,769<BR>\n" );
document.write( "2                         601,325<BR>\n" );
document.write( "3                         166,736<BR>\n" );
document.write( "4                         22,299<BR>\n" );
document.write( "5                         6,730\r<BR>\n" );
document.write( "\n" );
document.write( "Let x be a random variable indicating the number of times a student takes the SAT. Show the probability for this random vaiable.(to 4 decimals)\r<BR>\n" );
document.write( "\n" );
document.write( "x=1<BR>\n" );
document.write( "x=2<BR>\n" );
document.write( "x=3<BR>\n" );
document.write( "x=4<BR>\n" );
document.write( "x=5\r<BR>\n" );
document.write( "\n" );
document.write( "My answer was<BR>\n" );
document.write( " 1-7217.69<BR>\n" );
document.write( "2-3006.62 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #409045 by </B><A HREF=/tutors/aboutme.mpl?userid=ash.ghadge><B>ash.ghadge(2)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ash.ghadge><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=409045\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> probability:   p(x) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28x%29%2Fsum+f%28x%29 ALIGN=MIDDLE  ALT=\"f%28x%29%2Fsum+f%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "x(no. of attempts of CAT) | f(x)(no. of students  |    p(x) (probability)<BR>\n" );
document.write( "             1            |      721,769          |  721,769/1518,859 = 0.4752 <BR>\n" );
document.write( "             2            |     601,325           |  601,325/1518,859 = 0.3959<BR>\n" );
document.write( "             3            |      166,763          |  166,763/1518,859 = 0.1098<BR>\n" );
document.write( "             4            |      22,299           |  22,299/1518,859  = 0.0147<BR>\n" );
document.write( "             5            |      6,730            |  6,730/1518,859   = 0.0044<BR>\n" );
document.write( "----------------------------------------------------------------------------------<BR>\n" );
document.write( "            sum           |      1518,859         |              1\r<BR>\n" );
document.write( "\n" );
document.write( "find sum of all students. it is sum f(x) = 1518,859  <BR>\n" );
document.write( "and sum of probabilitis should be 1 always. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );