I might get less than 50% in pcm in HSC more than 50% aggregate in physics,maths and electronics (vocational).Am I eligible for MHT CET?

Students should score a minimum of 50 % in all of the subjects together (including vocational  subject). Physics and Mathematics are compulsory subjects with any one of Chemistry/Biotechnology/Biology/Technical/Vocational subjects. So, if your marks in PCM turn out to be below 50%, it won't be an issue if your marks in Physics, Mathematics and Electronics are at least 50%. You'll be eligible in that case. Hope this helped.