A storage resource has a 12ms service time to service a request when there are no other requests in its queue. What, according to Little’s Law, would be the service time if the resource were 40% utilized?

A.
15ms

B.
20ms

C.
22.5ms

D.
27.5ms

E.
30ms

Explanation:
Response time = Service time / (1 – utilization).
Here: 12 ms/(1-0.40)=20 ms