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Sagot :
Answer:
18 minutes.
Explanation:
The standard deviation for the call time is 50 minutes while the average call duration is 25 minutes. The caller has to wait for sometime before the agent answers it because they have 4 agents who take up the calls from the clients. A call arrives every 20 minutes with a standard deviation of 20 minutes. In the given scenario the waiting time can be calculated using the formula below:
t = ( Ф * standard deviation + average call duration * standard deviation )
Solving the equation we get 18 minutes.
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