SoM, Pandit Deendayal Energy University (PDEU)

Fees of B.Sc. (hons) in mathematics is INR 6.80 Lacs.

Hi.
Check out this link for detailed information around your admission there:
https://sls.pdpu.ac.in/bsc-course.html.

I will suggest PDPU has a better college life, as the infrastructure of college is really good and they also have a number of qualified professors to teach the students in a best possible way. You can also refer the following links that contain the reviews of both the colleges that will help you to understand which college is better in every prospect. https://www.shiksha.com/university/Ahmedabad-university-38020
https://www.shiksha.com/college/spm-school-of-petroleum-management-pdpu-gandhinagar-30990

You can refer the following link to check the reviews related to academics and facilities in SPM - School of Petroleum Management PDPU. https://www.shiksha.com/college/spm-school-of-petroleum-mangement-pdpu-gandhinagar-30990

Computer Engineering course in PDPU was started first time in August 2016. so, you can study CSE from PDPU Gandhinagar. You can refer the following link for the details about the admission process at PDPU
https://www.shiksha.com/b-tech/course/b-tech-in-computer-engineering-school-of-technology-pandit-deendayal-petroleum-university-gandhinagar-265363.

SNU-Noida is better than PDPU Gandhinagar according to placements and over all University rank.

Yes, you can easily get admission in this college at this score but getting CSE might be difficult.