Our accompanying textbooks on http://openintro.org/books, all of which are free to download. Hard copies are also priced to be affordable for students. (We price our books in a way that we hope ensures all students can get a hard copy if they want one.)
Topics covered in this video:
Probability basics
Disjoint / mutually independent
Probability Distributions
Complement
Independence and probability
Video author, voice, and editor: David Diez.