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Unformatted text preview: trac with rate 30 calls/min. The durations of calls are independent and exponentially distributed with mean 3 min. Interarrival times are independent of call durations. How many circuits should the company provide to ensure that an attempted call is blocked (because all circuits are busy) with probability less than 0.01? It is assumed that blocked calls are lost (i.e., a blocked call is not attempted again). 5. Find the mean, variance, and moment generating function of a Poisson, Erlang, exponential, and Gaussian random variables. 6. Solve problems 23, 25, 29, 211, 217, 218, 220, 223 in the Schwartz book....
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 Spring '11
 shroff

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