I passed 12 with 80% but with excluding maths (although I passed it there's best five rule in cbse). Am I still eligible for NITS?
They consider the marks of physics, chemistry, maths, one language and any other subject.Then the percentage is taken out.In your case I cannot say anything as the criteria is just missing by a decimal.
In most cases you will not be eligible for the NITs or IIITs or IITs, but you should have belief in yourself.
All the best and stay motivated.