Discrete Math II/Combinatorics (Entire course) - Discrete Math II - 6.1.3 The Subtraction and Division Rules

We finish up section 6.1 by discussing the last two basic counting rules; the subtraction and division rules. The subtraction rule is really just the principle of inclusion-exclusion. You might also see it called the General Addition Rule, as it is about "or" questions and addition of possible outcomes. The "difference" (sorry, dumb math humor) is that we subtract any elements that were counted in both sets we added. The division rule isn't one we use often, but we go through one quick example to show how to account for options that were counted multiple times. Video Chapters: Intro 0:00 The Subtraction Rule Example 0:15 The Subtraction Rule Formalized 5:59 The Division Rule 10:41 The Division Rule Example 11:32 Up Next 13:49 This playlist uses Discrete Mathematics and Its Applications, Rosen 8e Power Point slide decks to accompany the videos can be found here: https://bellevueuniversity-my.sharepoint.com/:f:/g/personal/kbrehm_bellevue_edu/Ei9DcmrOBTlAuMxWUoq9ZqsB14M60jcpob-xdAYS6ruVWw?e=uP9KN0 The entire playlist can be found here: https://www.youtube.com/playlist?list=PLl-gb0E4MII0sGLCJeqDB3y63HZ6lM5LJ