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Statistiiiiics HEELLLP!

An average of 5 automobiles arrive at a certain intersection every minute according to a Poisson distribution.
a. What is the mean number of minutes that elapse between arrivals?
b. What is the probability that more than 1 minute elapses between arrivals
c. What is the probability that less than 30 seconds elapses between arrivals?

Thankyou :)


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