document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=185518>Question 185518</A>: <I><SPAN STYLE=\"word-break: break-all;\"> can someone please help me solve this. thanks\r<BR>\n" );
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document.write( "From a group of 18 customers,5  are to be chosen to receive a special gift. Assuming that the order in which the customers are chosen is irrelevant, how many groups of 5 customers can be chosen? \r<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 #139172 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=139172\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> can someone please help me solve this. thanks <BR>\n" );
document.write( "From a group of 18 customers,5 are to be chosen to receive a special gift. Assuming that the order in which the customers are chosen is irrelevant, how many groups of 5 customers can be chosen? <BR>\n" );
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document.write( "The 1st one chosen can be one of 18, the 2nd 1/17, 3rd 1/16, etc., so there are 18*17*16*15*14 possibilities.<BR>\n" );
document.write( "But, since ABCDE is the same group as ADCEB, we have to divide by 5*4*3*2*1, since each of the had that many chances to be picked.<BR>\n" );
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document.write( "So it's 18*17*16*15*14/5*4*3*2*1 = 1028190/120<BR>\n" );
document.write( "= 8568 possibilities<BR>\n" );
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document.write( "This is 18!/((18-5)!*5!), btw </SPAN>\n" );
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