Hello Aspirant ,

The ranks are decided based on many factors like the difficulty level of the examination,the total number of test-takers,the maximum marks obtained by the candidates in the DU JAT exam amd the average score of the candidates obtained in the entrance exam. So until they officially release the rank list , a prediction won't be accurate. You may calculated your composite scores by adding your 65 % entrance score and 35 % of boards marks. Usually an entrance score above 300 out of 400 and a 12th  percentage above 95 can make you come under top 100-150 ranks. Please wait for the official rank list to release because calculating it is a complex process.

The below link may be useful to you ,

https://bschool.careers360.com/articles/du-jat-cutoff

All the best