BCA

Maths is not compulsory for BCA.

Hello,
The eligibility criteria to get admission in Amity University is minimum qualifications 12th passed and minimum % requirement is 50. For more information you can find below link:
https://www.shiksha.com/it-software/course/bca-mca-amity-university-Noida-207104
For DU:
https://www.shiksha.com/university/university-of-delhi-24642/admission

Visit the Shiksha link given below to get the placement details of all the colleges in Lucknow:
https://www.shiksha.com/it-software/colleges/bca-colleges-Kanpur

After 12th, you can opt for BCA for getting job in software.

Fistfull to do MBA:
You have to be eligible for that and to be eligible for MBA you need to do your under graduation so you can choose BCA or BBA to complete your MBA BCA has good scope but for that you need a good college check out some good colleges for yourself and pursue your BCA or BBA to study MBA because you don't have very good marks. Still, you have a chance to get a good college if you can clear the entrance.
Good luck.
Thank you.