document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=167638>Question 167638</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A box contains 42 batteries, 7 of which are defective. If 5 are selected at random, find the probability that: all are defective and none are defective. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #123526 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=123526\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A box contains 42 batteries, 7 of which are defective. If 5 are selected at random, find the probability that: all are defective and none are defective.<BR>\n" );
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document.write( "P(all are defective) = 7C5/42C5 = 21/850668 = 0.000024685....<BR>\n" );
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document.write( "P(none are defective) = 35C5/42C5 = 324632/850668 = 0.38162...<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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