a probability distribution the probability of a specific incident to occur times out of times is a combination, so: such that ,
a random variable is binomially distributive with the parameters and is written as if receives the values with the probabilities (the formula above)
- the symbol of the binomial distribution is
- expected value is
- variance is
bernoulli trial
independent repeated trials of an experiment with exactly two possible outcomes are called bernoulli trials
if then