Edexcel S2 2016 June — Question 5

Exam BoardEdexcel
ModuleS2 (Statistics 2)
Year2016
SessionJune
TopicApproximating Binomial to Normal Distribution
TypeFind parameter from normal approximation

5. In a large school, \(20 \%\) of students own a touch screen laptop. A random sample of \(n\) students is chosen from the school. Using a normal approximation, the probability that more than 55 of these \(n\) students own a touch screen laptop is 0.0401 correct to 3 significant figures. Find the value of \(n\).
(8)
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