Dear Raza, yes you can. Make a time table, stick to it. Work one one sample paper a week atleast. Check if you are able to answer all questions within the given time. Now JEE Mains pattern has changed. the changed JEE Mains 2020 pattern will have 75 questions in all. 20 MCQs from Physics, 20 MCQs from Chemistry and 20 MCQs from Mathematics. and 5 Numerical Questions in Each section are also asked. Each sections is for 100 marks and the paper in total is for 300 marks. Each correct answer gets you 4 marks and a wrong answer takes away 1 mark. This negative marking is applicable only for MCQs and not Numerical Questions. You can check the weightage for each subject at our page:
https://engineering.careers360.com/articles/jee-main-syllabus-weightage

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