* The school: Grading scales and standards differ between schools and even between teachers within the same school.
* The student population: A school with high-achieving students will likely have a higher average than a school with more struggling students.
* The subject: A student might excel in math but struggle in reading, leading to an uneven overall average.
* The grading system: Some schools use letter grades (A, B, C, etc.), while others use numbers (90-100%, 80-89%, etc.), or a combination.
To find the average grade, you'd need specific data from a particular school or group of students.