Greetings ,

Aditya , As per the eligibility  criteria : 

You need at least a 3 year bachelor's degree with at least 50 % marks or 45 % in case if you belong to  SC/ST category which you will have after you finish your final year at Mumbai University . 

And as far as age is concerned there is minimum age of around 25 but there is no upper age limit . 

And as MBA colleges need any Bachelor's degree for the course which means if you get a degree with at least 50% ( as you are in final year of college ) then you are eligible  to enrol in the following colleges which are listed according to your scores .

GOVERNMENT COLLEGES 

Malaviya National Institute of Technology , Jaipur

Indian Institute of Social Welfare and Business Management , Kolkata

Department of Business Management , Osmania University , Hyderabad 

Maharaja Sayajirao University of Baroda , Vadodara 

Institute of Management Studies . Ranchi 

Pt Ravishankar Shukla University , Raipur

University of North Bengal , Siliguri 

PRIVATE COLLEGES 

SIMSR Mumbai :KJ Somaiya Institute of Management Studies and Research 

Institute for Financial Management and Research ,Chennai 

Department of Management Sciences University of Pune 

Goa Institute of Management 

SIES College of Management Studies ,Mumbai 

Pune University of Management Science , 

Institute for Financial Management and Research , Sri City 

Jaipuria Institute of Management , Lucknow 

Sydenham Institute of Management Studies , Research and Entrepreneurship Education, Mumbai 

KJ Somiaya Institute of Management Studies and Research , Mumbai

PSG Institute of Management , Coimbatore

AIMS , Bangalore 

Vignana Jyothi Institute of Management , Hyderabad 

SIES College of Management Studies , Mumbai 

NL Dalmia Institute of Management Studies and Research , Mumbai 

Prestige Institute of Management , Gwalior  

UPES , Dehradun 

Gian Jyoti Institute of Management 

Institute of Public Enterprise ,Hyderabad 

University of Petroleum and Energy Studies , Dehradun 

I hope this article might have helped you answer all of your questions but if not do drop a comment or post another question and I will be delighted to solve all of your further queries and doubts . 

Hi Aditya.

Greetings.

Your b.tech failure will not affect any chances but you should focus on attaining as much marks as you can in your bms.

Colleges available for you are as follows:

1.SIMSREE,MUMBAI

2.IFMR,CHENNAI

3.GLIM,CHENNAI,GURUGRAM

4.PUMBA,PUNE

5.XISS,RANCHI.

All the Best.