Hii aspirants

let me clear your doubt. the marks vary from year to year. Its basically depend upon level of exam. Here I am providing you link where you can find previous year cut off the cut-off marks respective of the different categories and departments.for different colleges

https://engineering.careers360.com/articles/jee-main-cutoff

here you can check previous year rank for different nit college.

I hope my answer will be helpful for you

Good luck