The time between arrivals of buses at a station is exponentially distributed with an average arrival time of 15 minutes. What is the probability that a passenger will have to wait more than 20 minutes for the next bus?
Added by Lucy Y.
Step 1
The average arrival time (μ) is given as 15 minutes. The rate parameter (λ) is the reciprocal of the average arrival time, so λ = 1/μ = 1/15. Show more…
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