Practice variation 3 of 3
Binomial distribution — Single-draw building block
Your question
With 3 red and 7 green, points / , show the one-draw expectation is .
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?