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    May 10, 2007, 11:02 AM
    expected mean
    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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