| Exam Board | Edexcel |
|---|---|
| Module | S2 (Statistics 2) |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Approximating the Binomial to the Poisson distribution |
5. In a manufacturing process, $2 \%$ of the articles produced are defective. A batch of 200 articles is selected.\\
(a) Giving a justification for your choice, use a suitable approximation to estimate the probability that there are exactly 5 defective articles.\\
(b) Estimate the probability there are less than 5 defective articles.\\
\hfill \mbox{\textit{Edexcel S2 Q5}}