Jawaharlal Nehru University

Yes, there will be an entrance exam for admission in the 2nd year.

Please refer to this link for details:
https://www.shiksha.com/humanities-social-sciences/economics/course/m-a-in-economics-jawaharlal-nehru-university-mehrauli-delhi-88690

Hi! It happens around the month of May. Kindly keep a track of the official website of the university to stay updated with the information.

As far as you are going to do your Masters in arts so maths is compulsory in 12th whenever you opt for any stream.

Yes, this course has this subjects and you can choose your specialization too.

JNU does not offer the course that you mentioned, there are many other good college you can try to get admission check them all out on Shiksha.com.

I don't think you will be able to secure admission here, as you do not fulfill the eligibility requirement.
The eligibility is as below:
Candidate should have obtained a Bachelor's degree in Economics (Hons.) with Mathematics, as subsidiary subject. Or, Mathematics (Hons.) with Economics, as a subsidiary subject or Statistics (Hons.) with Mathematics and Economics as subsidiary subjects securing 50% marks in aggregate or any other Bachelor's degree with 60% marks with Economics and Mathematics, as subjects from any recognized university.