
> Original Message > From: mi400bounces@xxxxxxxxxxxx / Joe Pluta > Sent: Monday, September 20, 2004 4:03 PM > > > BTW, 100! = 9.3 e+153 = the number of any possible combination of a > > list of 100 elements. Were you thinking of a different value? > > Factorials are permutations. Combinations are "far smaller", relatively > speaking. The number of possible combinations of N elements is 2^N, or > in the case of 100 elements, about a million possibilities. Darn it dude! I knew this stuff in the last millenium, but my brain turned fuzzy tutoring my kids through 8th grade math! So, forgive my ignorance, but what is 2^N? In the example above, is it 2^100, or 2 to the 100th power? Windows calculator has a x^y button and when I type 2 [x^y] 100 [=], I get 1,267,650,600,228,229,401,496,703,205,376. Does the following represent 3 permutations but only 1 combination? a) 1, 5, 8 b) 5, 1, 8 c) 8, 5, 1 (Re)learning my math today! db
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