what if someone fails in the improvement examination in isc but has passed previously in all the subjects.will his last year pass certificate still be valid or he will he declared failed ?
Improvement exams are for improving your grades. If someone fails then ther is no problem, previous year marks are valid. You will have two report cards and you can go with any of them. Generally it is advisable to give improvement exams only if you are confident enough that this tie you will get better marks.
All the best.