CBSE 12th

Well give JEE Mains, JEE advanced and CET and score good to get admission in good engineering colleges like NITs and IITs.

You can appear for the entrance exam conducted by ISI for maths after completing 10+2.

Dear Rahul,
You can't do anything in economics as it requires maths in 12th. However, you can do BBA (with any specialization) or B.Com.
Ask any query at anytime.
Good luck buddy.

Hey Aman,
First of all, it is mandatory to have physics, chemistry and maths as your academics subject in class 12th. Only having maths is not enough for NIT. And for taking admission in an NIT, you should appear in JEE (Mains), which is conducted by CBSE every year as well as my knowledge it is also mandatory to score 75 % for IIT & NIT. For further details, you should check this article :
https://www.shiksha.com/b-tech/articles/iit-nit-iiit-cfti-admission-eligibility-criteria-revised-blogId-13261

Hi Nitish,
You can opt for computer science or information technology branch, as not much mathematical skills are required in it. You can also look for textile or plastic engineering. As you have a low score, you can try in private engineering colleges in your state. Definitely, you will get above mentioned branch in it.