Question 1 - A-Level Maths

Exam Board	Edexcel
Module	S2 (Statistics 2)
Year	2005
Session	June
Topic	Binomial Distribution
Type	Basic E(X) and Var(X) calculation

It is estimated that \(4 \%\) of people have green eyes. In a random sample of size \(n\), the expected number of people with green eyes is 5 .
1. Calculate the value of \(n\).
The expected number of people with green eyes in a second random sample is 3 .
Find the standard deviation of the number of people with green eyes in this second sample. expected number of people with green eyes is 5 .
Calculate the value of \(n\) - The expected number of people with green eyes in a second random sample is 3 .
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