1. Home
  2. Elementary statistics
  3. Probability topics
  4. Probability topics: summary of

4.4 Probability topics: summary of formulas

<< Chapter < Page
  Elementary statistics   Page 1 / 1
Chapter >> Page >
This module provides a review of the probability formulas, including the definitions of independent, complementary, and mutually exclusive events as well as the addition and multiplication rules.
Formula

Compliment

If A and A' are complements then P(A) + P(A' ) = 1

Formula

Mutually exclusive

If A and B are mutually exclusive then P(A AND B) = 0 ; so P(A OR B) = P(A) + P(B) .

If A and B are NOT mutually exclusive then P(A OR B) = P(A) + P(B) - P(A AND B)

Formula

Independence

If A and B are independent then:

  • P(A|B) = P(A)
  • P(B|A) = P(B)
  • P(A AND B) = P(A) P(B)
<< Chapter < Page Page > Chapter >>

Read also:

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Elementary statistics. OpenStax CNX. Dec 30, 2013 Download for free at http://cnx.org/content/col10966/1.4
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Elementary statistics' conversation and receive update notifications?

Ask