Question

There were 75 customers in the store at 1:00. The store must be emptied of customers when it closes at 5:00. How many customers must leave the store between 4:00 and 5:00?

Answer 1

87 customers

Explanation:

Consider the below table is attached with this question.

From the below table it is clear that the number of customers entered between 1:00 to 4:00 is

`30+14+18=62`

The number of customers leaved between 1:00 to 4:00 is

`-12-8-30=-50`

Total change in the number of customers between 1:00 to 4:00 is

`62-50=12`

There were 75 customers in the store at 1:00. So, total number of customers at 4:00 is

`75+12=87`

The store must be emptied of customers when it closes at 5:00

Therefore, 87 customers must leave the store between 4:00 and 5:00.