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#1 2006-03-30 09:07:00

MathsIsFun
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Combinatorics Formulas

Combinatorics Formulas


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman
 

#2 2006-04-07 02:06:07

ganesh
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Re: Combinatorics Formulas

Permutations

The number of Permutations (arrangements) of n different things taken r at a time



where n! = n(n-1)(n-2)(n-3)......4 x 3 x 2 x 1

Some Important results







Combinations

The number of combinations (selections) of n different things taken r at a time


Some Important results








Character is who you are when no one is looking.
 

#3 2006-10-02 03:27:21

All_Is_Number
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Re: Combinatorics Formulas

Last edited by All_Is_Number (2006-10-02 10:48:10)


You can shear a sheep many times but skin him only once.
 

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