My marks got decreased by 1 mark in cbse revaluation so should i update my new marks im du form or continue with the old marks? Also i don't have new marsksheet of after revaluation sp how would i be able to update my new marks?
You should use your new marks as they got approved by the CBSE. You will receive the new marksheet after you surrender your old one.
You may have got a statement regarding the change in marks. You can use it as a proof of new marks.
Hope this helps.