document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=710221>Question 710221</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A box contains 21 yellow, 24 green and 27 red jelly beans. <BR>\n" );
document.write( "If 13 jelly beans are selected at random, what is the probability that: <BR>\n" );
document.write( "a)   10 are yellow?  <BR>\n" );
document.write( "b)   10 are yellow and 2 are green?  <BR>\n" );
document.write( "c)   At least one is yellow?\r<BR>\n" );
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document.write( "Sorry but i dont have the slightest clue how to do this.I would aprreciate the help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #436926 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=436926\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A box contains 21 yellow, 24 green and 27 red jelly beans.<BR>\n" );
document.write( "There are 72 jelly beans.<BR>\n" );
document.write( "---------------------------- <BR>\n" );
document.write( "If 13 jelly beans are selected at random, what is the probability that: <BR>\n" );
document.write( "a) 10 are yellow?<BR>\n" );
document.write( "# of ways to succeed: 21C10*51C3<BR>\n" );
document.write( "# of possible outcomes: 72C13<BR>\n" );
document.write( "---<BR>\n" );
document.write( "P(10 yellow) = [21C10*51C3]/72C13 = 0.0001036...<BR>\n" );
document.write( "======================================================= <BR>\n" );
document.write( "b) 10 are yellow and 2 are green?<BR>\n" );
document.write( "P(10 yellow and 2 green) = [21C10*24C2*29C1]/72C13 = 0.000039814<BR>\n" );
document.write( "------------------------------------------ <BR>\n" );
document.write( "c) At least one is yellow = 1 - P(none are yellow)<BR>\n" );
document.write( "= 1 - [51C13/72C13]<BR>\n" );
document.write( "---<BR>\n" );
document.write( "= 0.9933<BR>\n" );
document.write( "==============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=============== <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );