s010 
Probability distributions of random variables

s020 
Mass function

s030 
Barplot of a mass function

s040 
Formulas for discrete random variables

s050 
Bernoulli trial

s060 
The binomial distribution

s070 
The binomial distribution

s080 
The binomial distribution

s090 
Expected value and variance of a binomial distribution

s100 
The Poisson distribution

s110 
The Poisson distribution

s120 
The Poisson distribution

s130 
Changing units

s140 
The expected value and variance of a Poisson distribution
