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June 2019 p63 q5
3009
On average, 34% of the people who go to a particular theatre are men.
A random sample of 14 people who go to the theatre is chosen. Find the probability that at most 2 people are men.
Solution
Let the probability that a person is a man be \(p = 0.34\). The number of men in a sample of 14 people follows a binomial distribution \(B(14, 0.34)\).
We need to find \(P(X \leq 2)\), where \(X\) is the number of men.