The number of subsets of size r that can be formed from a
Chapter 9, Problem 9.174(choose chapter or problem)
The number of subsets of size r that can be formed from a set with n elements is denoted _____, which is read as _____.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer