Hello there, Ribhu. If you want to pursue Bachelor in Comouter Applications, then your aggregate marks must be 50% in Class 12 including Mathematics or Computer Science. 

-The aggregate marks is calculated on the basis of 5 top subjects. But besides scoring more than the aggregate marks, it is compulsory for the students to pass in each and every subject. If any student will be fail in any subjects in Class 12th, then he will not be eligible to take admission in the Entrance Examination.

-Your overall score is 60% which is sufficient to take part in the Entrance Examination. 

-Now about Mathematics: If you are from C.B.S.E Board, then the passing marks is 33% for Mathematics and you have scored 42% it means you are eligible to register.

-But in some State Boards, the passing marks is 45% and so in that case, you will be unable to register. 

Is there anything more in which I can help you? If yes, then do mention. All the Best :)