The manager of a gas station has observed that the times required by drivers to fill thier car's tank and pay are quite variable. In fact, the times are exponentially distributed with a mean of 7.5 minutes. What is the probability that a car can complete the transaction in less than 5 minutes?

Required probability is 0.487

Explanation:

At the gas station the manager perceived that to fill up the tank and payment done by the driver are having variable time. In this circumstance, the intervals are exponentially dispersed with an average of 7.5 minutes.

In this request, the constraint A is the facility time, which is distinct as the average number of facility time per minute.

Let X signify the business interval of a car.

Given the facility intervals are exponentially disseminated with an average of 7.5 minutes.

µ = 1/ʎ= 7.5 min

⇒ ʎ= 1/7.5 min

To compute the probability that car complete transaction less then 5 min

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