MBA Admission chances

IIM - Mumbai would be a better option.

It is very good for learning and teaching faculty is good, it also offers certificate programme in business analytics and big data. The average salary ranges from 3-6 LPA. Refer the following link for the website:
https://www.shiksha.com/mba/course/master-business-administration-asm-s-institute-international-business-research-iibr/153341

Yes, you have good chances to get call from XIME-Bangalore. Your academic profile is decent. Perform well in GD/PI selection processes, you can clear it easily.
Good luck.

You can look for IFMR. Its a good college known for finance with 100 percent placement record since inception. Its among few institutes in India which is offering financial research. You can also look for Christ, Welingkar and ITM.

Dear Sagar Patel,
CMAT score, and its influence on the entrepreneurship changes over the period of time. For more details, follow and check the link: https://www.shiksha.com/mba/colleges/mba-in-entrepreneurship-colleges-in-ahmedabad.
All the best.

Yes, you will get a form as well to fill before WAT/ PI and they will inform you about the dates and slots, accordingly. Yes, IIM - Raipur in the recent years have made the mark and it is one of the best option to pursue MBA.
All the best.

Assuming you are referring to Maharashtra CET, you can get into SIES and Welingkar. But the cutoff changes according to the level of the paper. 2016 CET paper witnessed a high cutoff in-spite of a hard paper.
My opinion - Don't settle on anything less than 99.99. Prepare hard.

In case of MAT, usually colleges look into the composite score rather than the percentile. 50% is the usual eligibility criteria for most colleges, so I guess you are safe.