SCENARIO 5-12 Phone Calls Arrive at the Rate of 50 Per Hour

Short Answer

SCENARIO 5-12
Phone calls arrive at the rate of 50 per hour at the reservation desk for Queen City Airways.The desk manager has asked you for an analysis of the call rates and probabilities to better understand the operation and determine if more call desk workers are needed.
-Using Scenario 5-12,What is the expected number of calls when calculating the probability of receiving nine calls in a 12-minute period?