Hello,

The minimum requirement  to appear for NRTI AAT is 55% for General,50% for other categories. Since the course was offered from this academic year the exact selection criteria has not yet been released.They have considered the  composite score considering your school ,undergraduate and field experience points.If you are willing to sacrifice a year for the top institutes,you should give other exams like CAT,GMAT etc also a try. Here is a link to help you ace the exams https://bschool.careers360.com/articles/cat-preparation-how-prepare-for-cat-without-coaching

Best wishes.