document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=271215>Question 271215</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a group of 30 pupils, 20 are girls and 10 are boys. From these 30 pupils, 5 are chosen at random. In how many ways may they be chosen? And find the probability that there are exactly 3 girls in the group of 5 chosen. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #198616 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=198616\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a group of 30 pupils, 20 are girls and 10 are boys. From these 30 pupils, 5 are chosen at random. In how many ways may they be chosen?<BR>\n" );
document.write( "Ans: 30C5 = 142506<BR>\n" );
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document.write( "And find the probability that there are exactly 3 girls in the group of 5 chosen.<BR>\n" );
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document.write( "Ans: [20C3*10C2]/30C5 = 513000.36/142506 = 0.36<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. \r<BR>\n" );
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