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Addition Rule for Probability


Videos and lessons to help High School students learn how to apply the Addition Rule, P(A or B) = P(A) + P(B) − P(A and B), and interpret the answer in terms of the model.

  • Define the probability of event (A or B) as the probability of their union. 
  • Understand and use the formula P(A or B) = P(A) + P(B) – P(A and B).

Common Core: HSS-CP.B.7

Related Topics:
Common Core (Statistics & Probability)

Common Core for Mathematics

Addition Rule for Probability
Venn diagrams and the addition rule for probability.

Addition Rules for Probability
How to find the probability of mutually exclusive events and non mutually exclusive events using the sample space for cards and dice.

Addition Rule (Probability "or")

General Addition Rule for Probability
Demonstrates a few examples of how the General Addition Rule is used.


Addition Rule of Probability.

The Addition Rule for Probability
Finding probabilities with the addition rule.

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