document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=601644>Question 601644</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A bag contains five red and four blue tokens. A token is chosen at random, the colour recorded and the token is not replaced. A second token is chosen and the colour recorded. Find the probability that\r<BR>\n" );
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document.write( "a the second token is red given the first token is blue,\r<BR>\n" );
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document.write( "b the second token is blue given the first token is red,\r<BR>\n" );
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document.write( "c both tokens chosen are blue,\r<BR>\n" );
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document.write( "d one red token and one blue token are chosen<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 #379947 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=379947\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A bag contains five red and four blue tokens. A token is chosen at random, the colour recorded and the token is not replaced. <BR>\n" );
document.write( "A second token is chosen and the colour recorded. <BR>\n" );
document.write( "Find the probability that <BR>\n" );
document.write( "a) the second token is red given the first token is blue:::<BR>\n" );
document.write( "If the 1st is blue that leaves 5 red and 3 blue<BR>\n" );
document.write( "Ans: 5/8<BR>\n" );
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document.write( "b the second token is blue given the first token is red::: <BR>\n" );
document.write( "If the 1st is red that leaves 4 red and 4 blue<BR>\n" );
document.write( "Ans: 4/8 = 1/2<BR>\n" );
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document.write( "c both tokens chosen are blue:::(4/9)*(3/8) = 1/6<BR>\n" );
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document.write( "d one red token and one blue token are chosen<BR>\n" );
document.write( "P(rb or br) = 1-(P(2red)+P(2blue))<BR>\n" );
document.write( "= 1 - [(5/9)(4/8) + (1/6)]<BR>\n" );
document.write( "= 1 - [(5/18)+(1/6)]<BR>\n" );
document.write( "= 1 - [8/18]<BR>\n" );
document.write( "= 1 - 4/9<BR>\n" );
document.write( "= 5/9<BR>\n" );
document.write( "================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================\r<BR>\n" );
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