5 On average, 1 in 75000 adults has a certain genetic disorder.
- Use a suitable approximating distribution to find the probability that, in a random sample of 10000 people, at least 1 has the genetic disorder.
- In a random sample of \(n\) people, where \(n\) is large, the probability that no-one has the genetic disorder is more than 0.9 .
Find the largest possible value of \(n\).