Hello Khusi,

As you are the student of class 12th board isc then you are totally familiar with the all syllabus of class 12th in previous class because the isc board syllabus are bit good they taught in earlier classes. And this the plus point for you.

If you start from 15th August then the examination of isc board  may next year in month march then you have correctly six month for study and this enough time to break any record of percentage and you asked about above 90% . I can clearly say that if word hard and complete focus on your goal then you will be do so.