Question

The owner of the Good Deals Store opens a new store across town. For the new store, the owner estimates that, during business hours, an average of 90 shoppers per hour enter the store and each of them stays an average of 12 minutes. The average number of shoppers in the new store at any time is what percent less than the average number of shoppers in the original store at any time? (Note: Ignore the percent symbol when entering your answer. For example, if the answer is 42.1%, enter 42.1)​

Answer 1

Answer:

60

Step-by-step explanation:

The estimated average number of shoppers in the original store at any time is 45. In the new store, the manager estimates that an average of 90 shoppers per hour enter the store, which is equivalent to 1.5 shoppers per minute.

The manager also estimates that each shopper stays in the store for an average of 12 minutes. Thus, by Little’s law, there are, on average,  N=rt=(1.5)(12)=18 shoppers in the new store at any time.

This is (45−18)/45​×100=60 percent less than the average number of shoppers in the original store at any time.