hi,

see this year 75% marks criteria has debarred from jee main or jee advance, but next year it may be the same as previous years. however if you have less than 75% marks in 12th you are not eligible for iits and nits, cftis.

however you are eligible to take admission in Delhi technological University.

eligibility criteria is candidates passed Class 12 from a recognised education board 10+2 with 60% marks in aggregate of Physics, Chemistry and Mathematics along with English as one of the main subjects .

the eligibility criteria for nsut for btech program is candidates must completed  Class 12 from a recognised board with Physics and Chemistry as compulsory subjects and one out of Biology/ Mathematics as an optional subject with a minimum of 75% aggregate (65% for SC/ ST candidates)

hope it would help.