document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=40310>Question 40310</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help?<BR>\n" );
document.write( "Two urns contain each contain white balls and black balls. Urn 1 contains four white balls and two black balls urn 2 contains six white balls and five black balls. A ball is drawn from each urn. What is the probability that both balls are black? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #25719 by </B><A HREF=/tutors/aboutme.mpl?userid=Fermat><B>Fermat(136)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fermat><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=Fermat><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=25719\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Urn1: 4W & 2B<BR>\n" );
document.write( "Urn2: 6W & 5B<BR>\n" );
document.write( "P1 = P(Urn1 -> Black ball) (P1 is the probability that urn1 will give a black ball)<BR>\n" );
document.write( "P2 = P(Urn2 -> Black ball) (P2 is the probability that urn2 will give a black ball)<BR>\n" );
document.write( "P = P1 * P2 (P is the probability that both balls will be black)<BR>\n" );
document.write( "Now,<BR>\n" );
document.write( "In urn1, there are 6 balls in total, with 2 of them black, So,<BR>\n" );
document.write( "P1 = 2/6<BR>\n" );
document.write( "========<BR>\n" );
document.write( "In urn2 there are 11 balls in total, with 5 of them black, So,<BR>\n" );
document.write( "P2 = 5/11<BR>\n" );
document.write( "=========<BR>\n" );
document.write( "P = P1 * P2<BR>\n" );
document.write( "P = (2/6) * (5/11)<BR>\n" );
document.write( "P = 10/66<BR>\n" );
document.write( "Ans: P = 5/33<BR>\n" );
document.write( "============= </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );