Sampling from Finite Populations

In the univariate case, the hypergeometric distribution arises in sampling from a finite population with a dichotomy of items, provided that the sampling is without replacement. Thus, we may consider a population of N items consisting of N₁ of Type I and N₂ of Type II. A random sample of n items is drawn, without replacement, from this population. Let the random variable X be defined as X = number   of   Type   I   items   appearing   in   the   sample . https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315138480/5ae0c873-2684-4218-84a5-01e21f92e64f/content/eq916.tif"/>