25 Jun
2010
25 Jun
'10
4:25 p.m.
I'll do that, dividing those big numbers gives heaps of rounding errors anyway, and the results I get aren't really trustworthy
spend enough time with this stuff a week ago 8-)
But really: If you have large N then you can just approximate it with (N- Z)* p^Z and p = Y/N Or it will be even more stringent than the exact calculation... Otherwise you can calculate it like this and avoid the faculties: (N-Z) * Y/N * (Y-1)/(N-1)*...* (Y-Z+1)/(N-Z+1)