CBSE 12th

In mathematics, integration and derivation and geometric section are the most important in civil engineering. In physics, a measurement is the most important topics in civil engineering. In chemistry, properties of solid elements are the most important topics for civil engineering.

At least 50% is required to get into graduation. Most of the institutes keep a threshold of 50% in 10/12th. Also, based on institute you are looking for criteria varies.

Hello Raju,
As you are interested in computer you can do BCA or B.Tech in CS branch for making a good career in computer education.

Yes, you can go for it.

You need to clear IIT-JEE or similar engineering entrance exam to get into an engineering institute. Many institutes offer IT as a discipline in engineering.

It's nice to see that you are interested in banking jobs after completion of your Higher Secondary Education.
But, to apply for banking you must have the graduation degree:
https://www.eduncle.com/ibps-po-recruitment-exam
In bank, you get mainly two positions in bank:
1. Bank PO
2. Bank Clerk

It will be difficult to get in top fashion designing colleges. You need to check with respective colleges for admissions.
You can also try for national institute of design entrance exam. A good score may enhance your chances.

What is your stream?

Dear Yashwanth,
Instead of running around for better average package, it is advisable that you seek admission in some good colleges in your periphery. Just walk-in and find out about the various colleges. Focus on your studies once admission is done. If your scorecard is good and once you develop good negotiation skills then getting a good package will be much easier for you. So, work hard in your ultimate goal of BBA. I hope this would suffice. Go ahead. All the best and God bless you.