(main)[2]
Find the probability that at least one of the first three people approached agrees to complete the survey.
Mathematics 9709 · AS & A Level · The Poisson distribution
The Poisson distribution — practice question
A statistics student asks people to fill in a survey. The chance that a randomly selected person will agree to complete it is $0.2$.
Worked solution & mark scheme
This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Apply a valid probability approach such as $1 - (0.8)^3$, or any unsimplified equivalent expression for at least one completion” …
- Full mark scheme, point by point
- Step-by-step worked solution
- Write your answer & get it marked instantly by AI