document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=476890>Question 476890</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A box contains n tickets marked 1 through n. Two tickets are drawn in succession without  <BR>\n" );
document.write( "    replacement. Determine the probability that the numbers on the tickets are consecutive integers.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #327024 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=327024\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If there are n = 2 tickets only, the probability is 1.  So we exclude this case.  Assume that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n%3E=3 ALIGN=MIDDLE  ALT=\"n%3E=3\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "There are 2(n-1) possible pairs of consecutive integers in two drawings.  There are n(n-1) ways of drawing two pairs of tickets.  Hence the probability is  <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282%28n-1%29%29%2F%28n%28n-1%29%29+=+2%2Fn ALIGN=MIDDLE  ALT=\"%282%28n-1%29%29%2F%28n%28n-1%29%29+=+2%2Fn\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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