A brandom variable/b is a variable whose value depends on the outcome of a random event.

The range of values that a random variable can take is called a bsample space/b.

A bdiscrete/b variable can only take specific numerical values, and a bcontinuous/b variable can take any numerical value in a range.

A bprobability distribution/b describes the probably of any outcome in the sample space.

bDiscrete random variables/b

The probability distribution of a discrete random variable can be described in the following ways:

Using a probability mass function

Using a table

Using a diagram