document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=264622>Question 264622</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many ways can a committee of 7 be chosen from 20 people?<BR>\n" );
document.write( "I know you use 20 C 7 and that the answer is 77520, but I do not understand HOW to get the answer, can anyone do it step by step? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #194801 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=194801\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 20 C 7<BR>\n" );
document.write( "20!/7!13!<BR>\n" );
document.write( "20!=2.4329*10^18<BR>\n" );
document.write( "7!=5,040<BR>\n" );
document.write( "13!=6.227*10^9<BR>\n" );
document.write( "2.4329*10^18/(5,040*6.227*10^9)<BR>\n" );
document.write( "2.4329*10^18/3.138*10^13<BR>\n" );
document.write( "77,520 ANS. </SPAN>\n" );
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