Riddles Random Riddle: Bank Wait Times May 14, 2023April 5, 2023 gags Suppose a small bank has one teller and customer transactions take 10 minutes on average. With 5.8 customers arriving per hour, what is the expected wait time? What would it be if you added a second teller? Show answer With one teller, customers will wait nearly five hours on average. But adding a second teller makes the wait go down to 3 minutes.