Suppose that arrival times at a certain emergency care center are following a Poisson process with a mean rate of  λ  = 0.2 arrivals  per minute. Let T be the time until the third arrival. Find the mean and the variance of T, and find  P(T  ≤  10)  to four decimal places.   Part 1 out of 3 The mean of T is _______minutes.

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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Suppose that arrival times at a certain emergency care center are following a Poisson process with a mean rate of 
λ
 = 0.2 arrivals
 per minute. Let T be the time until the third arrival. Find the mean and the variance of T, and find 
P(T 
 10)
 to four decimal places.
 
Part 1 out of 3
The mean of T is _______minutes.
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