: n a:
maxkX'es of n
11 - .
The example calculates the probability that 3 elements is
drawn with the mark X (p = 0.6) from a total of 20 by drawing
4 at a time or 1 by 1 without replacement.
Here the elements are replaced by drawing so that the prob-
ability is the same every time an element is drawn (uncondi-
This routine calculates the number of combinations of dra-
wing k elements from n without replacement, without regard