I did my graduation in B.tech. with electronics and communication engineering.can i do M.Sc. from maths after B.tech. from RU.

Eligibility for msc is graduation. So you can do it. But doing Mtech is much more beneficial than that of Msc. Now a days, so many students are doing msc math after bsc and ba maths. So I advice you to do Mtech than that of Msc. Also after btech, there are so many career opportunities, you wil

Yes you can do as MSc. will accept any of the graduation