Blog
Series:
2 posts
Combinations Are Just Permutations That Forgot Their Order
How dropping the order requirement connects permutations to subsets, and why binary strings, grid paths, and choosing teams are all the same problem
Counting Gets Interesting When Things Start Repeating
Why counting "at least one" is harder than it looks, how overcounting sneaks in, and what anagrams reveal about arranging things that aren't all unique