Q30 Consider an Internet cafe with 20 terminals, 600 users, and 8 hour open a day. Assuming that each user randomly uses the terminal once a day on average, and the usage time is exponentially distributed with 12 minutes on average. (1) Calculate the waiting probability, the mean number of waiting users, and the mean waiting time for the terminal. (2) Calculate the probabilities for the waiting time to exceed 6 minutes in FIFO and RSO, respectively. Q30 Consider an Internet cafe with 20 terminals, 600 users, and 8 hour open a day. Assuming that each user randomly uses the terminal once a day on average, and the usage time is exponentially distributed with 12 minutes on average. (1) Calculate the waiting probability, the mean number of waiting users, and the mean waiting time for the terminal. (2) Calculate the probabilities for the waiting time to exceed 6 minutes in FIFO and RSO, respectively