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Determine the probability that fewer than $18$ cameras are substandard.
Mathematics 9709 · AS & A Level · The Poisson distribution
The Poisson distribution — practice question
For cameras on a production line, the chance that a camera chosen at random is substandard is $0.072$. A random sample of $300$ cameras is inspected.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Mean and variance obtained correctly: $\mu=300\times0.072=21.6$, $\sigma^2=20.0448$” …
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