document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=470213>Question 470213</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a scientific study there are 12 guinea pigs, 9 of which are pregnant. If three are selected at random without replacement, find the probability that none are pregnant. \r<BR>\n" );
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document.write( " -- I could figure this problem out if it were asking the probability of all three selected are pregnant, but I can't seem to find the right answer to this question. What are the steps/the formula to solve this?\r<BR>\n" );
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document.write( "Thanks so much! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #322710 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=322710\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> there are 12C3 ways of selecting a group of 3 guinea pigs\r<BR>\n" );
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document.write( "only ONE of the groups contains all 3 non-pregnant guinea pigs </SPAN>\n" );
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