In a grading system defined by certain marks, which set contains values from different equivalence partitions?

To determine why the set mentioned contains values from different equivalence partitions, it is essential to understand the concept of equivalence partitioning in testing. Equivalence partitioning is a testing technique that divides input data into partitions of equivalent data from which test cases can be derived. Typically, the partitions are based on valid and invalid ranges or specific thresholds set within the system.

In a grading system, marks can generally be classified into several categories, such as failing marks (0 to just below a passing score), passing marks (from the lowest passing score to a higher threshold), and perhaps distinction marks (for scores above a certain high grade).

The set 0, 45, 79, and 87 includes a mark from the failing range (0), a passing mark that is just above the failing threshold (45), and two higher marks (79 and 87) which fall within the effective passing range and into distinction.

This set clearly spans across different equivalence partitions:

• The score of 0 represents the lower end of the failing partition.

• The score of 45 marks a transition point into the lower end of the passing range.

• The scores of 79 and 87 illustrate higher performance within the valid range, likely crossing into higher classification