There's a change in rules and the student's thinking manner every year and also the cut-off changes. So, these are the factors to attain admission in NIT Goa or any other lower-ranked NIT. Some new rules are imposed every year.
To be safe and have admission in NIT Goa or any other lower-ranked NIT, the OBC students could attain a score of 150 out of 360. Through this score, a student from the OBC category can have admission to the average NIT.
This is not the score for the general category students as they need to attain a higher score because of the reservation policies.