# Binomial Distribution

## Notations for Binomial Distribution

*n: the number of total trials**p: the probability of success in only one trial**q: the probability of failure in only one trial (1 - p = q)**x: certain number of success in only one trial*

## In the example...

*p = .47**q = .53**n = 10**x = 5**P(5)= 10C5 * .47^5 * .53^5 = .242**Mean= n * p = 4.7**Varience= n * p * q = 2.49**Standard Deviation= (n * p * q)^1/2*