The binomial distribution is a probability distribution that generalizes the probability that a value will take on one of two independent values given a set of parameters or assumptions.

The basic assumptions of the binomial distribution are that there is only one outcome for each trial, that each trial has the same probability of success, and that each trial is mutually exclusive or independent of each other.

The binomial distribution is the usual discrete distribution used in statistics, as opposed to a continuous distribution such as the normal distribution.