Equation for mutually exclusive
P(A U B) = P(A) + P(B)
Non-mutually exclusive equation
P(A U B) = P(A) + P(B) - P(A n B)
Independent event equation
P(A n B) = P(A) x P(B)
Random variable
Where the sum of the probabilities if all its possible values is equal to 1
ΣP(X=x) = 1
Sample space
The set of all possible outcomes
Usually equal to 1
Conditional probability equation