document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=710403>Question 710403</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A box contains 4 red marbles and 3 blue marbles. 2 marbles are drawn at random without replacement. What is the probability that the second marble drawn is blue given that:<BR>\n" );
document.write( "(a) the first marble drawn is red\r<BR>\n" );
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document.write( "(b) the first marble drawn is blue\r<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 #436988 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=436988\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A box contains 4 red marbles and 3 blue marbles. 2 marbles are drawn at random without replacement. What is the probability that the second marble drawn is blue given that:<BR>\n" );
document.write( "(a) the first marble drawn is red <BR>\n" );
document.write( "P(blue | red) = 3/(3+3) = 1/2<BR>\n" );
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document.write( "(b) the first marble drawn is blue <BR>\n" );
document.write( "P(blue | blue) = 2/6 = 1/3<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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