what is the salary after doing bsc in maths?
Well nobody is going to give you a job as soon as you complete your Bsc. You will have to proceed further doing Masters or else you can prepare yourself for the competitive exams. If you go for the masters, you can then do Phd and get a professor's job. The starting salary there maybe 30–40 thousand. Or if you go for a competitive exams, there again is a wide area field. You can apply for a normal clerk whose salary starts from 25k or you can apply for UPSC which is the highest level Exam in India right now. And getting a UPSC job can help you earn upto 1Lakh rupees a month or more!
All The Best.