From the Math 30-1 Information Bulletin 2023-2024:

Taken from the Alberta Education website:

“Students are able to solve permutation problems that involve 1 or 2 constraints, but many students have difficulty solving problems with multiple cases”.

This video lesson unpacks the process for attacking combinatorics problems involving cases. Specifically we will look at how the phrases, at least and at most, relate to answering these types of questions. Be sure to try the practice questions that follow.