How much marks should I score to pass in engineering graphics and maths during 3 internal exam of 1st sem CE at Dharmsinh Desai University?

At Dharmsinh Desai University, the criteria to clear exams in the subjects with labs is to score 68 marks in all. These marks are a combination of

• 12 internals
• 4 Attendance
• 18 externals 
• 34 practical

So, you should score 12 marks in each internal in the case of Engineering Graphics to make a total of 36. So the average is 12 marks for internals. A total of 24 in internals, a minimum of 24 in externals, and a decent attendance record will help you pass. In all, it doesn't matter how much you score in individual exams, in the case of internals all you need is a total of 36 to be on the safer side.
However, in Maths the scenario is a bit different. There are no practicals so you need to score a total of 45 marks instead of 68. So in math, you should score a total of 45 in the internals and 24 in the externals to pass. Here the 45 score score comprises 

• 15 internals
• 24 externals)
• 4(attendance)

The total is 43. Here you may pass with grace but to stay on the safer side is better to score 45.
hope this helps you!

One of my friends graduated from Dharmsinh Desai University a few years back and he was able to give some information regarding the scoring system at the institute.

• There is a minimum benchmark score of 36 in total, which needs to be scored cumulatively in three internals for every subject. A division of 12+12+12 is estimated from the total required score. You will need to score at least 12 in every sessional exam.
• There are 4 marks allotted for the attendance percentage of students. So, in total, every student needs to score at least 16 marks for every subject in each sessional paper.
• Consider an example, if you scored 20 in the first internal for a specific subject, you need to score only 16 marks from the remaining two, provided you are getting full marks allotted for attendance.

In general, try to score as high as possible. For subjects like maths, practice the type of sums given in exams repeatedly.