document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=727138>Question 727138</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A bag contains 5 red marbles, 10 blue marbles, and 20 green marbles. <BR>\n" );
document.write( "If two marbles are taken out at random, one by one, without replacement, what is the probability that they are both blue?\r<BR>\n" );
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document.write( "I know the total is 35 marbles but I am unsure how to calculate. I attempted to do 10/35, 9/34 and so forth and added all the results together but I fear it is not correct. <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #444975 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=444975\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  A bag contains 5 red marbles, 10 blue marbles, and 20 green marbles. <BR>\n" );
document.write( "If two marbles are taken out at random, one by one, without replacement, what is the probability that they are both blue? <BR>\n" );
document.write( "I know the total is 35 marbles but I am unsure how to calculate. I attempted to do 10/35, 9/34 and so forth and added all the results together but I fear it is not correct.<BR>\n" );
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document.write( "# of ways to pick 2 blue: 10C2 = 45<BR>\n" );
document.write( "# of ways to pick a random pair: 35C2 = 595<BR>\n" );
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document.write( "P(2 blue without replacement) = 45/595 = 9/119<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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