Sri Venkateswara College, University of Delhi

Admissions are to be closed because the last date of admission is ended. But you can try your luck by visiting the college and talk to the concerned authority or admission commute. If the seats are vacant they will give you admission.

Yes, choose Venkateswara over SGBT as you will get a good number of choices here for subject selection.
The faculty here is also good.

Last date of language course is 11th July. Only offline application has to be submitted to the admin office.

Both the courses are best in their own place. It depends on your interest. More than 50+ colleges offer economics honours but only 10+ colleges under DU offer statistics (Hons). I would suggest you do statistics (Hons) from Sri Venkateshwar College because if you do this course and get good marks and knowledge of this subject then you will get easily placed in an MNC.

Only one will be counted basically. College will take only non-creamy layer certificate. No benefits will be given to you for UG admission.

Can you please reframe the question?
If it is 86% marks, you can easily get any good college.

Sri Venkateswara College has got better faculty for humanities courses, rather than Shaheed Baghat Singh College. But, if you have scored 86% chances of getting into Venky are slightly low, still you can try, as it depends solely on cut offs. All the best.

No, Maths is not necessary for B.Sc in biological science course, but you must have physics chemistry and biology. All the best.

The last date for German language is 11th July. Only offline application to be submitted to the admin office.