N2007 P2 Q6
N2007 P2 Q6
Junior College 2
7 marks
In a large population, 24% have a particular gene, A, and 0.3% have gene B. Find the probability that, in a random sample of 10 people from the population, at most 4 have gene A.[2]
A random sample of 1000 people is taken from the population. Using appropriate approximations, find
- the probability that between 230 and 260 inclusive have gene A,[3]
- the probability that at least 2 but fewer than 5 have gene B.[2]
Solution:
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Answer:\(0.933\); (i) \(0.717\); (ii) \(0.616\).
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