• Announcements: Please remember that Homework 1 is due next Wednesday, and will be available on Blackboard shortly.

• Video 1: Recap from last lecture, and combinations: Download file or watch below

• Video 2: Pascal's triangle and Pascal's relations: Download file or watch below

• Video 3: Binomial Theorem: Download file or watch below

• Video 4: Multinomial coefficients and Multinomial Theorem: Download file or watch below

• Video 5: Counting exercises: Download file or watch below

• Video 6: Walking around a grid (e.g., Manhattan): Download file or watch below

• Video 7: Number of positive/nonnegative integer solutions to equations: Download file or watch below