Colleges in Mumbai

No, they din't. You should have good marks in 12th for admission there.

Please see: https://www.shiksha.com/business-management-studies/course/post-graduation-diploma-in-business-administration-mit-school-of-distance-education-kothrud-pune-217036

Hi Naman,
Kindly specify which course (college) you wish you know about as the one that you have mentioned is different from the one you have specified in the question.

You need to give an Entrance exam i.e. CET. It is mostly held in March. And to get into Dalmia, you need a percentile above 98 to get into MMS which comes under the Mumbai University. You can also apply for PGDM which is through the college; being the same as MMS.
But for admission through PGDM you need to score above 90 percentile and than clear GDPI rounds which will be held in the College

For PG, with percentile, many factors are considered. You have to go through GD PI rounds. Based on your performance throughout the rounds your selection will be done. Prepare well.
All the best.

Hi,
PG admissions are done. Lectures have already started. You can try next year.
All the best.

As the fee structure is not disclosed by the college, I would request you to contact the college officials to know the same.
For contact details refer to this link:
http://kti.ac.in/

MBA is not offered in Xavier's College, Mumbai. Please refer to the link below to know about the courses offered:
https://www.shiksha.com/college/st-xavier-s-college-mahapalika-marg-Mumbai-1184/courses?ct[]=151&lo[]=1153.