(i)[4]
Find the probability that entrance $B$ is selected by at least 2 friends.
(ii)[4]
Find the probability that the three friends all pick the same entrance.
Mathematics 9709 · AS & A Level · The Poisson distribution
The Poisson distribution — practice question
Three friends, Rick, Brenda and Ali, attend a football match but do not agree on which entrance to the ground they will use to meet. The ground has four entrances, $A$, $B$, $C$ and $D$. Each friend selects an entrance independently.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correctly work out the probability for each person and each entrance” …
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