Question 998085
<font face="Times New Roman" size="+2">


It depends on whether order matters, that is to say: Is the selection {Alice, Bob, Charles, David, Elizabeth, Fred, Gayle, Herman, Iris} the same as or different from the selection {Iris, Gayle, Charles, David, Elizabeth, Fred, Bob, Herman, Alice}?


If order matters (the two example selections are different), then you want *[tex \Large _{40}P_9\ =\ \frac{40!}{(40-9)!}].


If order does not matter (the two examples are considered to be the same selection, then you want *[tex \Large _{40}C_9\ =\ \frac{40!}{9!(40-9)!}]


Either way, you can do your own arithmetic.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  

</font>