AB is not a standard, recognized letter grade in most grading systems. The closest equivalent and most likely interpretation would be a B. Generally, grading scales progress with pluses and minuses around the core letter grade (A, B, C, etc.).
To understand this better, let's look at a typical grading scale:
- A: Excellent
- B: Good
- C: Average
- D: Below Average
- F: Failing
In this context, the letter "A" represents a higher grade than the letter "B." The combination "AB" is most likely not a standard designation. If a grade is "AB," it is probable the person writing the grade intended to write "B" but made a mistake in writing the letter.
It's important to consider context. If "AB" is being used in a specific school, class, or situation, it's best to clarify directly with the instructor or institution. They may have a unique grading system.
Here's a typical GPA conversion scale for reference:
| Letter Grade | Percent Grade | 4.0 Scale |
|---|---|---|
| A | 93-96 | 4.0 |
| A- | 90-92 | 3.7 |
| B+ | 87-89 | 3.3 |
| B | 83-86 | 3.0 |
| B- | 80-82 | 2.7 |
Therefore, without further context, "AB" would most likely be interpreted as a typo and intended to be "B."
