Hi guys

First of all my maths is a bit rusty. I can't think of a solution to this simple problem.

I have the following things:
  • total score of each student (summed up value of scores in each exam)
  • total number of exams


I have to findout the rank of each student based on the above two values.

First I thought about using the average of total score, sorted in descending order as the rankings. But I think, it's not a correct approach to find the ranks.

Any clues on how to find it ?

Thanks in advance