p = dhypg(k,n,K,N) Input k,n,K,N nonnegative integers such that n<= N, K<= N and n-k<= N-K N is the total number of elements of the population n is the number of elements which are randomly extracted K is the number of elements of the population which have the studied property Output p probability Prob(X=k) where X is an hypergeometric random variable with parameters n,K,N