I think for prepared for jee main you may take help of you NCERT. So it may give some rough figure and I suggested that you focus on 100 % on your maths and Physics because it is the subject in which you score 100% and in chemistry, you may live or study later after you complete you syllabus is organic chemistry because it takes most of your which I think not valid for that topic in that time I study Calculus or some another topic. So you may get some basic. Start your study with your NCERT.

Good Luck.

Hi there

Before beginning with their preparations for JEE Main 2020  , students need to familiarize themselves with the syllabus and exam pattern. Acquainting themselves with the syllabus of JEE Main 2020, candidates can know what topics are important, the weightage given to topics and concepts and so on. 

For full tips and important topics for JEE MAINS 2020, kindly visit the link below:

https://engineering.careers360.com/articles/jee-main-2020/amp

Hope this helps. Good luck!