Online College Courses for Credit

4.2(a) Conditional Probability & Mulitplication Rules

4.2(a) Conditional Probability & Mulitplication Rules

See More

Try Our College Algebra Course. For FREE.

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to many different colleges and universities.*

Begin Free Trial
No credit card required

29 Sophia partners guarantee credit transfer.

314 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 27 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.


Important Note about Conditional Probability

There is a mistake in the tutorial about conditional probability! Please read this note carefully and make adjustments.

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