After attempted the full exam of MAT dec 17, how much marks I can expect to get admission in reputed college?

MAT cutoff for some of the top institutes are as follows. You can apply for these institutes based on your expected score:

TA Pai Management Institute, Manipal- 700
ABV- Indian Institute of Information Technology and Management, Gwalior- 700
Xavier Institute of Management and Entrepreneurship, Bangalore- 700
National Institute of Technology, Warangal- 600
Institute of Finance and International Management, Bangalore- 650
Institute of Public Enterprise, Hyderabad- 650
Balaji Institute of Modern Management, Pune- 600
PSG Institute of Management, Coimbatore- 600
Amity Business School, Noida- 500
Alliance School of Business, Bangalore- 500

All the best!