A warm welcome to our new friend, Susan!
Happy Birthday to Linda (10/5)!
Lesson review:
Chapter 4: Committees and Combinations
1. Choosing a “committee” (“combination”): the order doesn’t matter; while in a “permutation”, the order matters.
2. “n choose r”: 
3. Combinatorial identity:
Homework:
- Page 68: Ex 4.2.1, 4.2.3, 4.2.4
- Page 72: Ex 4.3.2 to 4.3.5
- Page 75: Ex 4.4.1 to 4.4.4
Extra Resource:
Next week:
if you are not coming next Sunday, please inform me ahead. So that I can plan my lesson accordingly. Thanks 🙂
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