document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=312826>Question 312826</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose two balls are drawn at random from a bag containing 7 blue and 4 orange balls.\r<BR>\n" );
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document.write( "A) if the first ball is replaced before the second ball is drawn wht is the probabily that both balls drawn are blue?\r<BR>\n" );
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document.write( "B)if the first ball is not replaced before the second ball is drawn, what is the probability that both balls are blue? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #223685 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=223685\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Suppose two balls are drawn at random from a bag containing 7 blue and 4 orange balls. <BR>\n" );
document.write( "A) if the first ball is replaced before the second ball is drawn wht is the probabily that both balls drawn are blue?<BR>\n" );
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document.write( "If you replace the 1st ball before drawing the second the draw results<BR>\n" );
document.write( "are independent.<BR>\n" );
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document.write( "P(2 blue)= P(blue and blue) = P(blue)*P(blue) = (7/11)^2 = 49/121<BR>\n" );
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document.write( "B)if the first ball is not replaced before the second ball is drawn, what is the probability that both balls are blue?<BR>\n" );
document.write( "P(blue | blue) = (7/11)(6/10) = 7/11 * 3/5 = 21/55<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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