Statistics, Machine Learning, Data Science, Central Limit Theorem, Sample.
is: it’s a mapping function whose input is a single outcome in the probability state-space, and output is a real number. We’ll use “r.v.” for short. An example of a Random Variable is the sum of two die rolls: the state-space of outcomes is all 36 pairs {(1,1), (1,2), ..., (6,6)} and the r.v. X =