Practice variation 1 of 3
Combinatorics — Unordered equivalent
Your question
For the same bag, the same-metal probability as an unordered selection of coins is
This practice question was inspired by Question 9 in the 2024 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?