Mathematics

Both the courses would help you get a job based on the research field in your graduation.
The applications of M.Sc. would help you in the traditional industrial field while M.Sc. alone would help you build a base for Ph.D. studies.

Hi Mohit,
Yes, Rajasthan University does provide M.Sc. In mathematics. Candidate must be pass in B.A. /B.Sc. (Pass course or Hons. ). Recognised by this under the 10+2+3 scheme with Mathematics as one of the subjects with at least 55% marks in the aggregate.
Regards.

There are Entrance exam for some of the universities. However, he/she will be considered for admission if he/she fulfils the other requirements of admission. I think, yes you are eligible to do M.Sc Maths after B.Tech (ECE), but mostly it depends on the university, where you are going to pursue Master's degree.

You should go according to your branch of interest. You need to opt for the field in which you are mostly interested because both the colleges are very good. If you don't have any branch issue then go for IIIT-Delhi.
Best of luck.

DU
Mumbai University
Christ, Bangalore
Stella Maris
Fergusson, Pune
BHU.

It totally depends on your interest, but if you are looking for job opportunities after graduation, go for B.Sc Statistics.

https://www.shiksha.com/science/colleges/b-sc-mathematics-colleges-Tamil-Nadu
https://www.shiksha.com/science/colleges/m-sc-mathematics-colleges-Tamil-Nadu.