Bernoulli's Theorem

If a trial of an experiment can result in success  with probability p and failure with probability q (i.e.1-p) the probability of exactly r success in n trials can be determined by Bernoulli theorem. .The formulae used is as follows:

Here, n = number of experiments

R= number of success  in the definite experiments

P= probability of success in an experiment and

Q= 1-p= the probability of unsuccess in the experiments.