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Nov 2015 p61 q1
3031
In a certain town, 76% of cars are fitted with satellite navigation equipment. A random sample of 11 cars from this town is chosen. Find the probability that fewer than 10 of these cars are fitted with this equipment.
Solution
Let the probability that a car is fitted with satellite navigation equipment be denoted by \(p = 0.76\).
The number of cars fitted with the equipment follows a binomial distribution with parameters \(n = 11\) and \(p = 0.76\).
We need to find \(P(X < 10)\), which is equivalent to \(1 - P(X \geq 10)\).