The time between arrivals at a toll booth follows an exponential distribution with a mean time between arrivals of 2 min

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answerhappygod
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The time between arrivals at a toll booth follows an exponential distribution with a mean time between arrivals of 2 min

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The time between arrivals at a toll booth follows an
exponential distribution with a mean time between arrivals of 2
minutes.
What is the probability that the time between two successive
arrivals will be less than 3 minutes?
What is the probability that the time will be between 3 and 1
minutes?
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