Hi there!!!

You can easily get 85% marks in cbse board examination for getting so you have to read well.Complete ncert first learn all the concepts and simultaneously solve the other books too so tha you can practice properly.Before,exam read from arihants previous year question bank of every subject and solve that chapterwise book of every subject and after doing these things you can easily 85% marks in cbse board examination...

Hope you got your answer,do upvote the answer if it helped you..

Best of Luck!!!


Regards,
Rajdeep Sinha