Hello , Aspairant

Well you have put this question for NIT ,so for getting admission in NIT colleges ,you have must have secured 75% if you are from cbse and for other boards i mean state boards your marks should in top 20 percentile.

Visit the below link do and read an article you will get everything there in detail.

https://engineering.careers360.com/articles/new-eligibility-criteria-for-nits-and-iiits-admission-says-mhrd

Hope this will help you 

All the best 

If you have further feel free to ask on this platform !!

 Thank you!!