is it important to score 60% in all subjects of pcm in order to be eligible for viteee

Hello student no its not like that you need not to obtain 60 percent marks in each subject as per eligibility criteria you need to obtain an aggregate of 60 percent marks.
Eligibility - Candidates must passed or appearing class 12 in Physics chemistry and Mathematics with minimum 60 percent marks aggregate from a recognized board.
For SC/ST only 50 percent.

For more details refer to the link mentioned below -
https://www.google.com/amp/s/engineering.careers360.com/articles/viteee-eligibility-criteria

Hello,
The eligibility criteria for VITEEE 2021 is that a candidate must have passed 10+2 or it's equivalent with Mathematics/Biology, Physics and Chemistry from a recognised board. Candidates belonging to general category must have passed with minimum 60% aggregate in the above mentioned subjects and for SC/ST category J&K/Ladakh and North eastern states candidates it is 50% aggregate.
So if you belong to general category then you must have scored 60% aggregate marks. If not you will not be eligible to get seat.