document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=870508>Question 870508</A>: <I><SPAN STYLE=\"word-break: break-all;\"> From a batch of 500 light bulbs, how many ways can three be tested to see if they 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 #525007 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=525007\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If order mattered, then there are 500*499*498 = 124,251,000 ways to test 3 lightbulbs (from a batch of 500). \r<BR>\n" );
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document.write( "Since order does not matter, we divide by 3! = 3*2*1 = 6 to get 124,251,000/6 = 20,708,500\r<BR>\n" );
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document.write( "Final Answer: There are <font color=\"red\">20,708,500</font> different ways to test 3 light bulbs (from a pool of 500). Order does not matter. </SPAN>\n" );
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