Probability Example: Drawing a Marble (OR with disjoint events)
Channel: Josiah Hartley
Date: 2015-12-28

This example is taken from Versatile Mathematics, an OER textbook created at Frederick Community College.  The book can be found at http://hartleymath.com/versatilemath/read, and is free to download.

The textbook and videos are freely available under the Creative Commons CC-BY-SA license.