Question

customer arrive at a barber shop at the rate of 8 per hour. The average time taken for a hair cut is 5 min. what will the average waiting time in the line of the shop​

Answer 1

Answer:

17.5 minutes

Step-by-step explanation:

Since their are 8 customers on the shop per hour

Then

1st customer need not to wait

2nd customer need not to wait = 5

3rd customer need not to wait = 10

4th customer need not to wait = 15  

And soon we formed the following sequence

0  5  10  15  20 25 30 35

The average of waiting times = sum of all times / number of customers

                                                 = ( 0+5+10+15+20+25+30+35 ) / 8

                                                 =  140 / 8 = 17.5    

Thus

On average the waiting time is 17.5 minutes