Hi omkar,
In my opinion if you are good in mathematics then you should go for Computer Science and Engineering because  in computer science and engineering course you have to frame algorithms as well as mathematical calculations for developing programs it also guarantees a bright future if you are hardworking and have some passion regarding your work . Also there is a branch in Computer Science Engineering called machine learning that is kind of teaching machines how to behave like humans or living beings this machine learning  is the most demanding Technology  in today's world and if you are good in mathematics as well as if you learn how to combine your mathematics techniques with the programming skills then you can be hired by big Robotics companies and can have a bright future in life

So in my opinion you should go for Computer Science and Engineering as you are good in mathematics you will understand the concept of Computer Science and Engineering easily

Hope it helps
all the best

Hello Omkar.

Congrats for the marks you have scored in 12th. It's good that you have decided to join engineering. Because engineering degree can be used in almost in any job and you also get to learn various skills. And remember that every engineering stream has it's own importance and application. Every stream has life and can place you in a good job if you are very good at your stream. So, choosing stream in engineering completely depends on your interest and passion. If you're interested in computer, go for CSE or interested in Electrical related things then go for ECE or EEE. Every stream requires basic knowledge in Maths.

All the best.