The number of phonecalls coming into a switchboard in the next five minutes will either be0, 1, 2, 3, 4, 5, or 6. The probabilities are the same for each of these(1/7). If X is the number of calls arriving in a five-minute timeperiod, what is the mean of X?

The number of phonecalls coming into a switchboard in the next five minutes will either be0, 1, 2, 3, 4, 5, or 6. The probabilities are the same for each of these(1/7). If X is the number of calls arriving in a five-minute timeperiod, what is the mean of X?

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Question

The number of phone
calls coming into a switchboard in the next five minutes will either be
0, 1, 2, 3, 4, 5, or 6. The probabilities are the same for each of these
(1/7). If X is the number of calls arriving in a five-minute time
period, what is the mean of X?

Expert Solution