0 5 10 15 20 25 30 0 0 0.05 0.1 0.15 0.2 0.25 0 Probability Random Variable N=500, r=50, n=30 N=500, r=100, n=30 N=500, r=250, n=30 N=500, r=400, n=30 N=500, r=450, n=30 Hypergeometric Distribution PDF