Practice variation 3 of 3
Pigeonhole principle — Minimal guarantee threshold
Your question
There are possible triples from topics. How many students guarantee that at least share a triple?
This practice question was inspired by Question 12(c) in the 2020 NSW HSC Mathematics Extension 1 examination, © NESA. It is an original TestMum variation that practises the same mathematical idea, not an official NESA question.
Before you check
- Have you stated every choice or assumption?
- Can another student follow each line?
- Did you verify the final result independently?