This situation involves N
items. a of the items are assigned the label 1 and
N – a are assigned the label 0. Select at random
a sample of n items from the N available without
replacement. The number of items in the sample labeled 1 is
the random variable of interest.
The values that result in nonzero probabilities are enumerated
by the statement following the probability statement. All other
values have 0 probability.
This distribution is used when samples are drawn from a larger,
but finite set.