Suppose that on a particular stretch of road between Port Elizabeth and Uitenhage, 30% of cars exceed the 120 km/h speed

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answerhappygod
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Suppose that on a particular stretch of road between Port Elizabeth and Uitenhage, 30% of cars exceed the 120 km/h speed

Post by answerhappygod »

Suppose that on a particular stretch of road between Port
Elizabeth and Uitenhage, 30% of cars exceed the 120 km/h speed
limit. A traffic officer sets up a speed trap on this stretch of
road to catch people speeding. Twenty cars pass his trap while he
is there.
What is the probability that 3 of the cars were
speeding?
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