document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=75992>Question 75992</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Four balls are selected at random without replacement from an urn containing three white balls and five blue balls. Find the probability of two or three of the balls are white. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #54573 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=54573\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Four balls are selected at random without replacement from an urn containing three white balls and five blue balls. Find the probability of two or three of the balls are white.<BR>\n" );
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document.write( "P(2 balls white) = 3C2/8C2 = 6/28<BR>\n" );
document.write( "P(3 balls white) = 3C3/8C3 = 1/[8*7*6/1*2*3]= 1/56<BR>\n" );
document.write( "These are disjoint events so add to get:<BR>\n" );
document.write( "12/56 + 1/56 = 13/56<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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