Dear Student,

You can get a engineering college even if you have scired less in 12th Class . If you have a good score or a good rank in jee you are eligible for getting a college. However NTA has re-introduced the 75% marks scheme for admission in IIT and NIT

For more information you can checkout this article :

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-eligibility-criteria/amp