Homework Help: math

Posted by skl on Thursday, May 10, 2007 at 3:53pm.

consider a two server system which a customer is served first by server 1, then by server 2 and then departs. the server times at server i are exponential random variables with rate ui i = 1,2.
a)When you arrive you find server 1 free and you find server one is free and one customers at server 2 .find the expected time that you spend in the system?

b)a)When you arrive you find server 1 free and you find server one is free and two customers at server 2 .find the expected time that you spend in the system?

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