MBA/PGDM

Hi,
There are no well-defined cut-offs for CAT and MICAT, not yet anyway.
Your chances of getting through MICA, given your performance in MICAT are good.
Note that the following factors play a role in your selection as a candidate to the MICA PGDM (C) programme:
Performance in MICAT
Performance in Group Exercise
Performance in Personal Interview
How your SOP builds a strong case for you to study at MICA.
Your fit to the overall batch as well as the institution.
Performance in CAT, an average score does't harm one here, but a good score builds impression.
To you, I'd say, prepare well for MICAT by brushing up your business GK well, ensuring your writing is good and you present your arguments well. I'm sure you are already working on the same. Let the future unfold all that comes.
Good luck.

As you have asked to tell about how to do MBA without any entrance exam. Yes, you can do an MBA through distance learning or a correspondence from any of these colleges distance learning programme. Sikkim Manipal University, XLRI Management Institute-Jamshedpur, FMS (Faculty of Management Studies), ISB (Indian School of Business-Hyderabad), SPJIMR, SP Jain Institute of Management and Research, IMT (Institute of Management Technology-Ghaziabad), Nirma Institute of Management-Ahmedabad, IRMA (Institute of Rural Management), Anand, XIMB (Xavier Institute of Management Bhubaneshwar), Amity Business School-Noida, LIBA (Loyola Institute of Business Administration), JRE Group of Institutions, Maharishi Dayanand University and Kurukshetra University.
Best of luck.