Hello Student

If you have not got expected marks in maths in 12 science examination then you appear for improvement examination of all subject that is math the next year whenever examination will be held again. For this you have to form fill up without authority of your college or institution for appearing for the maths paper which is an improvement examination under CBSE rules. New course that has spent of delivery of admit cards have to collect it and appear for the improvement examination of maths in the priority announced schedule or routine of the examination .

Hope this helps.