calculates the probability of a result within a range (inclusive, inclusive) * \returns \f$\displaystyle \left.P(n,p)\right|_{x_0}^{x_1} = * \sum_{i=x_0}^{x_1} P(i) * =\sum_{i=x_0}^{x_1} {n\choose i} p^i (1-p)^{n-i}\f$ */
Source from the content-addressed store, hash-verified