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Consider a link to which packets arrive as a Poisson process at a rate of 300 packets/sec such that the time taken to service a

Consider a link to which packets arrive as a Poisson process at a rate of 300 packets/sec such that the time taken to service a packet is exponentially distributed. Suppose that the mean packet length is 500 bytes and the link capacity is 1.5 Mbps. What is the probability that the link's queue has four and six packets, respectively?

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