---
title: "SU-CS109 SEP272023"
source: https://www.jemoka.com/posts/kbhsu_cs109_sep272023/
date: 2023-09-27
---

Key Sequence Notation New Concepts counting Important Results / Claims thinking by steps step rule of counting aka product rule of counting inclusion exclusion counting (&ldquo;counting with or&rdquo;) Questions Interesting Factoids
