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The number of cars arriving at a petrol station in a period of t minutes may...

The number of cars arriving at a petrol station in a period of t minutes may be assumed to have a Poisson distribution with mean 720t.

Use this information to answer questions 31-32.

  1. Find the probability that exactly 12 cars will arrive in one and half hours.

Find the probability that more than 24 cars will arrive in an hour.

Math   Statistics-And-Probability   
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