Exams like SRMJEE and VITEEE shall require minimum 60% in PCM for general category.
However exams like BITSAT, JEE advanced and Mains require minimum 75% marks.
For MHTCET criteria is slightly twisted as below:
https://engineering.careers360.com/articles/mht-cet-eligibility-criteria

Criteria for SC and ST category is always relaxed and is lower to general category for major exams.

Hello,
Well it depends on the college or exam and their respective eligibility criteria.Some of the entrance exams like VITEEE,SRMJEEE requires to have a minimum of 60% aggregate marks in pcm in class 12th board exams while some exam like BITSAT requires a minimum of 75% aggregate marks in pcm in class 12th board exams.
Good luck.