Hi Ananya,

JEE mains and advanced are the exams from which the students get IIT, MNIT ,NIT for BTech and engineering. Students should have at least 75% in 12th whether it is the aggregate or the overall percentage of 12th or you have score in PCM. There is no boundation that you should have 75% in PCM also but the overall percentage should be minimum 75%. If you have 75% then you are eligible for taking admission in IIT, MNIT, NIT etc..

I hope your question has been answered properly.

All the best for your future!