Question: Call requests arrive at a link with 5 trunks at the rate of 20 calls per hour. Suppose the average holding time for a call

Call requests arrive at a link with 5 trunks at the rate of 20 calls per hour. Suppose the average holding time for a call is 3 minutes. a. What is the probability that between 5 and 7 calls (i.e., 5, 6, or 7 calls) arrive in 30 minutes? b. What is the blocking probability? c. What is the utilization of the link? d. What is the minimum number of trunks that must be added to the link if a blocking probability of less than 0.0001 is desired

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