BCA

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.

I want to know which certificate you have? Whether it's a computer course related certificate or anything else? Because now a days many colleges give admission to students who are good in sports or have participated in any athlete at any district or national level. So, please specify if you have certificate of which type?

Dear Arnab,
There are many institutes like Lovely Professional University, Jalandhar; Christ University, Banglore; Manipal University, Jaipur; Birla Institute of Technology, Mesra, etc that offer BCA without Maths. All these universities offer world class learning atmosphere to students along with good placements. Some of these universities are even offer good scholarships to students on the basis of their previous qualification. Check their websites for more details.
Good luck.