Maths Spl

Hello Gaurav,
The fee structure for M.Sc applied mathematics at PSG College of technology is Rs. 45,670/- per annum. So, for two years it will be nearly Rs. 1 lakh rupees.
For further details refer:
https://www.shiksha.com/science/course/m-sc-in-applied-mathematics-psg-college-of-technology-coimbator

No, you cannot do M.Tech, because M.Tech is a technical degree for those candidates who pass out in B.Tech in their stream for B.Sc students can pursuing M.Sc.

Look, for BCA (as it is software engineering), it is programming. So, math is compulsory. Without maths, you won't get the admission.

Hello Sanjana,
IIT is a highly reputed and no. 1 institution in India which is recognized worldwide.
The admission into IITs is based on two exams JEE main and JEE Advanced.
You need to improve a lot in concept clarity and I'm sure your board syllabus will not be equal to JEE standards. You need to so

Whatever you choose, just do it with your interest and dedication.

Eligibility criteria for seeking admission in B.Sc computer science is maths in 10+2 stage in majority of universities.