Date:         Thu, 25 Apr 1996 15:33:36 -0500
Reply-To:     GERALD ZUCKIER <ZUCKIER@CHIME.ORG>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         GERALD ZUCKIER <ZUCKIER@CHIME.ORG>
Subject:      basic stats dumb question

First they ask me how many different subsets can I get out of a set with N
members, where order is not important, and after (too much) thought I was able
to come back with 2^N different subsets, including the null set. Now they want
to know how many different subsets, where order IS important. I did a lot of
scribbling and can get it down to a sort of recursive function, but is there a
simple answer to this question? Thanks.