Edexcel S2 2014 January — Question 7

Exam BoardEdexcel
ModuleS2 (Statistics 2)
Year2014
SessionJanuary
TopicApproximating Binomial to Normal Distribution
TypeFind parameter from normal approximation
  1. The random variable \(Y \sim \mathrm {~B} ( n , p )\).
Using a normal approximation the probability that \(Y\) is at least 65 is 0.2266 and the probability that \(Y\) is more than 52 is 0.8944 Find the value of \(n\) and the value of \(p\).
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