What is the general formula for the variance and mean of a binomial distribution? Statistics Binomial and Geometric Distributions Calculating Binomial Probabilities 1 Answer De Rono Oct 27, 2015 mean = #np# and variance = #npq# Explanation: Let #X ~ "Bin" (n,p)# then mean = #np# and variance =#npq# where #q=1-p# Answer link Related questions Why do we have to use "combinations of n things taken x at a time" when we calculate binomial... Question #3a8c6 What defines a binomial distribution? What is a binomial distribution? What is the difference between binomial distribution and Poisson distribution? What is the probability of getting 7 heads and 7 tails with 14 coin flips? What is the standard deviation of a binomial distribution with n=10 and p=0.70? What is the difference between a normal and binomial distribution? What is the variance of a binomial distribution for which n = 75 and p = 0.20? Is a binomial distribution supposed to be symmetrical? See all questions in Calculating Binomial Probabilities Impact of this question 3465 views around the world You can reuse this answer Creative Commons License