Binomial Probabilities

In the User Input Area provide the number of trials n, and the probability of a generic success p. Then, enter the value x for which probabilities are desired and click the Solve! button.

The Results Area will provide mean, standard deviation, and the probabilities of exactly x successes and at most x successes. Continuity-corrected normal approximations are provided as well.

User Input Area    
Enter # of trials and probability



Enter x then "Solve!"


Results Area    
Mean and standard deviation



Exact probabilities

P[ X = x ]

P[ X <= x ]
Normal approximations P[ X = x ] P[ X <= x ]

Stumped? Take a look at the tips & documentation.