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# 4.2(a) Conditional Probability & Mulitplication Rules

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Tutorial

## Important Note about Conditional Probability

The conditional probability of an event B in relationship to an event A is the probability that event B occurs given that event A has already occurred. The notation for conditional probability is P(B|A), read as the "probability of B given A". The formula for conditional probability is:

P(B|A) = P(A and B) / P(A)

## 4.2 a tutorial

Source: Created by Emily LeBlanc-Perrone using Brase & Brase Understandable Statistics

## 4.2 (a) Quiz

Source: Created by Emily LeBlanc-Perrone using Google Forms