Dear student,
If you are going to begin your preparation from scratch in these 50 days then it will be very hard to crack jee. There are many students who have been studying consistently for at least 2 years to crack jee, therefore it is almost impossible to come at par with them in just 50 days. However if you have been studying consistently then you can surely crack jee. Just go through the previous years question papers and sample papers for your revision. But if you are just starting your preparation right now, then give a read to ncerts and previous years question papers, you do not have much time left though. You can go through the following article:
https://engineering.careers360.com/articles/two-month-preparation-plan-for-jee-main-2020
Or even this one would help:
https://engineering.careers360.com/articles/how-prepare-for-jee-main-in-3-months/amp

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