Some calculators offer the use of calculating binomial probabilities. One such calculator is the Casio fx-991EX Classwiz which evaluates probability density functions and cumulative distribution functions.
In the first of the two videos that follow I demonstrate how the Casio fx-991EX Classwiz calculator evaluates probability density functions and in the second how to evaluate cumulative distribution functions.
Evaluating P(X=x) for X~B(n.p)
Evaluating P(X≤x) for X~B(n,p)