document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=408387>Question 408387</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A bag contains a total of 30 batteries, of which six are defective.  Selecting four at random, without replacement, determine the probability that none of the batteries you select are good.<BR>\n" );
document.write( "  (Points : 2) <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 #287738 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=287738\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A bag contains a total of 30 batteries, of which six are defective. Selecting four at random, without replacement, determine the probability that none of the batteries you select are good.<BR>\n" );
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document.write( "# of ways to get 4 bad: 6C4<BR>\n" );
document.write( "# of ways to select 4 without condition: 30C4<BR>\n" );
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document.write( "P(select 4 good) = 6C4 / 30C4 = (6*5*4*3)/(30*29*28*27) = 0.0005473...<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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