Hello,

ACPC merit marks is calculated from combining 40% of your percentile of your GUJCET marks and 60% of your percentile of PCM 12th Board Marks , whether it be GSEB, CBSE or ICSE. And according to your merit marks you will get your rank.

therefore to explain it with example:

let us suppose you have got x marks in PCM and y in GUJCET then your marks out  of  100 will be (0.6*y)+(0.4*x) and this marks will decide your rank in GUJCAT.

To predict your rank you can visit the link below, it will give you a probable idea about your rank:

I hope this helps!

All the Best!