Dear Student,

Your question is not very clear.

I assume you are asking whether the eligibility score  for engineering is calucated by adding up the marks scored in PCM only or marks in total of all the subjects. If so, then I must tell that the minimum required marks for engineering is 150 out of 300, which is the total of PCM only. 

Hope it helps.

Do revert if you have another query.

Good Luck.