What should be the strategy of a student to clear jee mains and advance along with getting 95%marks in class 12?

Study hard. That's all you need to do..

Hello,
First of all you need to clear your basic concepts from ncert books and build your fundamentals strong.Make a proper timetable and give equal time to each pcm and follow this timetable regularly.You need to utilise your precious time on your preparations.Just focus on analysing concepts and it's applications.Try to make proper notes of the impirtant topics as it will help you at the time of revision.
Solve as much as you can firstly ncert.After it try to solve HC VERMA,RD SHARMA,OP TONDON,ARIHANT MATHEMATICS,IRODOV,RC MUKHERJEE..this will make you practice every type of questions so that you will not face any problems in the exams.
During the last few months try to give maximum mock tests and practice previous years questions to get good marks.
Also,avoid distractions and stay fit and healthy during your preparations.Be confident while solving problems and be motivated!
Good luck.

Here are some preparation tips you can follow given below.

You should make your proper time-table. You can set your targets on daily basis and for weekly as well. So, that you can complete your syllabus on time and you get proper time for revision.

If you want to score good marks in JEE Main make sure your basics are clear. Make sure you read NCERT books throughly. So, that you can solve tricky questions easily.

You should be aware of the complete syllabus, exam pattern and important topics.You should complete your whole syllabus and focus on important topics more. You can solve as many as MCQs. For exam pattern and to know level of questions you can refer previous year papers.

Solve complete mock test series to work on your time management and to increase your speed. With the help of mock test series you can analyze your preparation level and you will get to know your strength and weakness. So, you can work upon them.