This video appears on the page: Permutations & Combinations

Tricky Permutation and Combination Problems for SAT

This video is all about doing tricky SAT combinatorics problems without using any formulas. Instead, we'll just make blanks, then fill in numbers and multiply in a sort of truncated factorial technique. Examples include how many ways you can rearrange the letters of a word, form a committee of both parents and teachers, compose a password, and limited seating arrangements.