Question

The text in white is question's statement. I'm stuck on second part of this problem. I am unable to write down any expression out of question's requirement?

Answer 1

See below for how to get the two answers:

Explanation:

For the part about the department , we can apply Little's Law:

`N=rT`

by substituting in `r=84` per hour and `T=1/12` hour, so

`N=84/12=7` people waiting in line.

For the part about the new store, we have `r=90` per hour and `T=1/5` hour, giving:

`N=90/5=18`

The first part of the question stated that there are 45 shoppers in the store at any given time. We want to know the percentage less that the new store is experiencing. And so we can say:

`(45-18)/45=27/45=0.6`