Practice variation 2 of 3
Normal distribution — Compute the exam n exactly
Your question
Show that the exam calculation gives before rounding.
This practice question was inspired by Question 14(d) in the 2021 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?