Question

Q2. Clare works at the front desk of DESB. Between 10:30am and 11:00am, 10 students stop by to ask questions on average. It usually takes 3 minutes to answer a question. What is the average number of students either waiting or asking questions to Clare at the front desk? (Be careful when you find the flow rate for this question!)

Answer 1

Answer:

One student is waiting at the front desk.

Explanation:

By Using Little's law, we have:

L = R  *  T

Here

L is the average number of items in the system which is average students waiting in this case

R (Arrival Rate) =  Total Students / Time taken = 10 Students / 30 minutes

R = 0.33 student per minute

T is the time taken for each student which is 3 minutes

By putting the above values, we have:

L = 0.33 * 3 = 1 student waiting