No need to worry according to your marks you are eligible to be part of jee main and advanced.
But you are having little low marks so you need to boost your jee main preparation to get gud iit and nit

Hello,
You need not to worry.To be eligible for IITs or NITs you have to score 'aggregate' total of 75% in your class 12th  including pcme+ an optional subject.
So you can prepare for jee mains and jee advanced and try to get IITs.For more cutoff related details click on the below given link:
https://www.google.co.in/amp/s/engineering.careers360.com/articles/jee-main-eligibility-criteria%3famp

Joint Entrance Examination (Main)

Answer Key | Eligibility | Application | Preparation Tips | Question Paper | Admit Card | Result | Accepting Colleges

Get Updates Brochure