Question

A school library allows students to borrow laptops. A computer program is used to count the number of times a

Answer 1

Answer:

A and D

Explanation:

explanation to A answer:

If you have to borrowed - Returned> 0, it is because this computer is currently in the possession of a student and has not been registered as returned, with this information you can tell if this computer is at inventory.

Explanation to D answer:

If the sum of borrowed and returned equals an even number, you can tell that the computer has been delivered the same number of times that it has been borrowed. In the same way when the sum is an odd number you know that it is in the possession of a student.

Answer 2

Answer:

A and D

Explanation:

A. The difference between borrows and returns is zero.

A. The difference between borrows and returns is zero.

D. The sum of borrowed and return is a positive even number.

At a point where the number of borrowed laptop and return laptop is zero, it is an indication that a particular laptop is not currently borrowed. For instance, if in a particular period of time a total number of borrowed computer is 50 and the total number of returned is 50 (50 - 50 = 0) it implies that no laptop is unreturned. While on the other hand if the number of borrowed and returned is a positive even number, this also implies that the number must be one of (even number) i.e 2,4,6,8,10,12,14,16,18,20 etc.