In this lesson, we are going to talk about the rule of inclusion and exclusion. The rule of inclusion and exclusion is a way of counting the union of two or more events. There is one important formula that you need to remember, and the other one can simply be derived from the first one. Memorizing the formula shouldn't be difficult, once you check its explanation in the video. This lesson covers the inclusion and exclusion for two events, and for three events. The latter formula is a little bit more complicated but again, once you see the explanation, it won't be so bad.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.