Maths Spl

Yes, from the 2nd year, you will get to study applied maths and in 3rd year, you have one full subject as applied component in DU maths Hons.

Yes, you could apply for engineering in any field only if you have maths in class 12th level.

Yes, you could do MA with stats from IGNOU.

Delhi University is the 2nd top institute for Masters in mathematics just after IISc Bangalore.

In which field of engineering are you more interested?

Yes, you still have chance to fill the counselling. Best of luck.

Yes, you can attend decentralized counselling.

Best flying schools in India are mentioned at the link provided below:
https://www.shiksha.com/bba/articles/best-flying-schools-in-india-know-the-pilot-s-choice-blogId-7317

Please check for your eligibility to apply for a course in BCA from teh criteria mentioned below:
BCA Course: Eligibility
Candidates who wish to pursue BCA course must fulfill the below mentioned eligibility criteria. Pass in 10+2 examination in any stream from a recognised board of education. English as a subject of study. A minimum aggregate score of 45% at 10+2 level. Some colleges prefer students from Science stream or those who have studied Mathematics and Computer Science at 10+2 level.
Regards.

Yes, you can buy you need to clear the entrance exam for the course and you need to study a little about computers and a good maths for the entrance as we as for the course.