- It will pay off handsomely on Test #2 which begins a week from tomorrow (October 19).
- It will pay off again on Test #3 because these counting techniques are central in many probability contexts.
- It will pay off a 3rd time on the final exam.

### Your most important week of the semester

This coming week is your most important week of the semester. Mastery of the multiplication principle and the concepts of permutations and combinations will pay off in three ways. And this week is when all the WebAssignments related to those topics are due.