Peter Kupfer wrote:
> Sorry should be combin, not combine (-e).
yay! It works! All is well in the world again.
Hey, it even gives the right answer ;-)
> >Does that match what you see?
>
> Your theory falls apart when b doesn't = 2.
>
> =combina(5;4) = 70
> =combin(5;4) = 5
>
> If you have time, play more. If combina=nPr, how are they different?
> (According to my good ole TI-89, they are not the same thing.)
No, they're not the same. nPr(5;4) = 5
The formulas are:
5! = 5 * 4 * 3 * 2 * 1 <<----- "5 factorial"
a!
nPr(a;b) = --
b!
a!
nCr(a;b) = ---------
b! (a-b)!
combina(a;b) = ???? <<<------ mystery...
I'll experiment.
Cheers,
--
Daniel Carrera | I don't want it perfect,
Join OOoAuthors today! | I want it Tuesday.
http://oooauthors.org |
