Addition Rule 1: When two events, A and B, are mutually exclusive, the probability that A or B will occur is the sum of the probability of each event. Addition Rule 2: When two events, A and B, are non-mutually exclusive, there is some overlap between these events.

What is additive probability?

The additive theorem of probability states if A and B are two mutually exclusive events then the probability of either A or B is given by. P(A or B)=P(A)+P(B)P(A∪B)=P(A)+P(B) The theorem can he extended to three mutually exclusive events also as. P(A∪B∪C)=P(A)+P(B)+P(C)

How do you calculate additive probability?

The Additive Rule of Probability

The probability of the union of two events can be obtained by adding the individual probabilities and subtracting the probability of their intersection: \begin{align*}P(A \cup B)=P(A)+P(B)-P(A \cap B)\end{align*}.