Problem: A call center receives an average of 50 calls per hour. Answering each call takes average of 5 minutes and there are 7 workers answering calls. Both call arrivals as well as service times fluctuate over time.
If call arrival rate increases to 70 class per hour, how would this impact customers' average waiting time?
Group of answer choices
1. It will increase by more than 40%
2. It will not increase
3. It will also increase by 40%
4. It will increase by less than 40%