Probability of Atleast One of the Events Occuring

This lesson is free - just sign in to access it.

This lesson is a part of the course Probability Concepts

Want full access? Our premium membership gives you unlimited access to all courses, quizzes, and downloadable resources.

Ask questions about this lesson and get instant answers.

This refers to the addition rule.

The additional rule determines the probability of atleast one of the events occuring.

P (A or B) = P (A) + P (B) - P (A and B)

If A and B are mutually exclusive, then P(A and B) = 0, so the rule can be simplified as follows: