What percentage do we need to score in MBA marketing to sit for the campus interview?

Atleast you need to score 60% + so that you are eligible for the campus interview. Maximum companies are asking for 60+ % or 7 CGPA for high salary package.

The sitting/eligible criteria of most of the companies is between 60 to 70 percentile. So you do not need to worry about sitting criteria but companies especially focus on your knowledge about marketing and almost every company see your knowledge about your field sometimes 90 percentile students are

Placement is not everything.There are colleges which give 100% placement but what matters is the average packages.