document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=221751>Question 221751</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an urn contains 4 red, 2 white, and 4 blue marbles. In how many ways can three marbles be selected so that at least one of them is blue? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #166264 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=166264\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  an urn contains 4 red, 2 white, and 4 blue marbles. In how many ways can three marbles be selected so that at least one of them is blue?<BR>\n" );
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document.write( "P(no blue) + P(at least one blue) = 1<BR>\n" );
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document.write( "So, P(at least one blue) = 1 - P(no blue)<BR>\n" );
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document.write( "P(none blue) = 6C3/10C3 = 20/120 = 1/6<BR>\n" );
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document.write( "Therefore: P(at least one blue) = 1-(1/6) = 5/6<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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