Unformatted text preview: that server is free or else remains with server 1 (blocking any other customer from entering service) until server 2 is free. Customers depart the system after being served by server 2. Suppose that when you arrive there is one customer in the system and that customer is being served by server 1. What is the expected total time you spend in the system? Question 3) Let X 1 and X 2 be independent exponential random variables. Without any computations, tell which one of the followings is correct. Explain your answer. (a) E[X 1 +X 2  X 1 > 1] = E[X 2 + 1] (b) E[X 1 +X 2  X 1 > 1] = E[X 1 +X 2 ] + 1 (c) E[X 1 +X 2  X 1 > 1] = E[X 1 ] + E[X 2 ]...
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 Spring '09
 temeldursun
 Operations Research, Probability, Probability theory, STOCHASTIC MODELS QUIZ

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