Indraprastha College for Women, University of Delhi

Yes of course you can. There is a wide range of courses to apply to including commerce, mathematics, psychology, sociology, political science, history, and others. The college also offers semi-professional media undergraduate course B.A. (Hons.) multi-media and mass communication, which is one of its type in India. The college conducts a 2-tier entrance for admission to this course.

BMMMC is course offered by Indraprastha College, Delhi University. The full form of the course is mass media and mass communication course. This course is a blend of the tools which are used for communicating with people along with the different ways in which the communication is being made. This is the only college in India until now which offers this blended course.
The placements of this college are good. Most of the students get placed during on-campus placements itself. Both print and electronic media agencies come to hire the students. Some of them are TOI, Hindustan Times, Aajtak and many more.

I don't know much about these colleges, but if you take the student reviews into consideration then both Gargi College, as well as Shaheed Bhagat Singh, are good.

Yes, you can surely apply in DU for your M.Sc in maths and based on your marks and the cutoff list for this year you may or may not get selected.