Question

A bank has an average random arrival rate of 3.2 customers’ every 4 minutes. What is the probability of getting exactly 10 customers during an 8 minute interval?

Answer 1

Find the expected number of customers in one minute

$$\frac{3.2}{4}=0.8$$

$$8\times0.8=6.4$$

Since the expected number of clients in 8 minutes is 6.4, the probability of ten clients visiting the bank is close to zero.