Mathematics 9709 · AS & A Level · The normal distribution

The normal distribution — practice question

In a large college, $32\%$ of the students have blue eyes. A random sample of $80$ students is drawn.

(main)[5]

Find an approximation for the probability that fewer than $20$ of these students have blue eyes.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Mean $25.6$ and variance $17.408$ correct” …