Art of Problem Solving: Counting Pairs

Art of Problem Solving's Richard Rusczyk explains how to count pairs of people. This video is part of our AoPS curriculum. Take your math skills to the next level with our advanced materials: 📚 AoPS Prealgebra Textbook: https://aops.com/store/book/prealgebr... 🖥️ AoPS Prealgebra 1 Course (Textbook Chapters 1-7): https://aops.com/school/course/prealg... 🖥️ AoPS Prealgebra 2 Course (Textbook Chapters 8-15): https://aops.com/school/course/prealg... More interested in counting? Checkout our Introduction to Counting & Probability materials: 📚 AoPS Introduction to Counting & Probability Textbook: https://aops.com/store/book/intro-cou... 🖥️ AoPS Introduction to Counting & Probability Course: https://aops.com/school/course/intro-... 🔔 Subscribe to our channel for more engaging math videos and updates