Media Summary: You can learn more about online Olympiad courses by visiting at and click on the "online" tab ... What are the only positive integers 'k' for which the average of the k-th powers of the binomial coefficients is always an integer? Combinatorics Counting number of ways to build up subsets.
Usamo1990 Problem 5 - Detailed Analysis & Overview
You can learn more about online Olympiad courses by visiting at and click on the "online" tab ... What are the only positive integers 'k' for which the average of the k-th powers of the binomial coefficients is always an integer? Combinatorics Counting number of ways to build up subsets. This is my first USAMO YouTube video on this channel, and I hope you enjoy it! A lot of EGMO stuff is involved here .
