Hello Zohra,

Revaluation is a concept related to examination, in which the student can claim for re-evaluation of his paper if he/she is not satisfied with the outcome(marks).  Under such cases, the paper can be applied for revaluation as per the guidelines provided by the respective government along with the successful payment of a suitable revaluation fee.

Concept:

If a paper is being applied for revaluation, then the mark secured by the student previously(before revaluation) is no longer valid .  So, the mark obtained after revaluation is only considered.  Even if the marks got reduced either minimally or drastically after revaluation, the student should accept.  But if the revaluation process gained some extra marks to the student, then its a profit to him/her.