Hi hi! Thanks for your reply, mathman.
It's all a bit confusing, I know. In my original problem, I had W white subunits and B black subunits, and when I wanted to look at the number of different combinations I could add them together, that would be
\frac{(W+B)!}{W!B!}
Now, as my next problem...
Hello there,
I'm working on a kinetic theory of mixing between two species - b and w.
Now, if I want to calculate the number of different species B bs and W ws can form, I can use a simple combination:
(W+B)!/(W!B!)
Now, in reality in my system, ws and bs form dimers - ww, bb, wb and bw...