Practice variation 2 of 3
Binomial distribution — Different mix
Your question
Bag: 2 red, 8 green; 5 draws with replacement; red , green . Expected score?
This practice question was inspired by Question 12(e) in the 2022 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?