A binom discrete random variable.
The probability mass function for binomial distribution is:
binomial distribution
.. math::
f(k) = \binom{n}{k} p^k (1-p)^{n-k}
for :math:k \in \{0, 1, \dots, n\} and :math:0 \leq p \leq 1.
k \in \{0, 1, \dots, n\}
0 \leq p \leq 1