Delhi University (DU)

It is through IIT-JEE marks. There is no special exam conducted by DTU.

No, you can't, when you pursue one course in one college your class 12th mark sheet and other document are to be submitted during admission process. At one time, you can't pursue dual course.

Hi, your best 4 subject percentage is calculated against the cut off released by DU. For further information, you can download the brochure of Delhi University, and you can also check out the last year cut off for different course on Delhi university website.

No, it is not compulsory, if you are getting admission in good college, and if you can manage both together, you should take in morning college of DU.

Sorry, you are just short by 13 marks in mathematics to get admission in DU. Otherwise you have scored decent marks in the rest of the subjects and would have easily made through the admission procedure. I think you should take a chance and apply for revaluation in Maths and hope for the best.
Good

No, firstly you have to clear your compartment paper then only you are eligible to take admission in DU colleges.

Delhi University B.Tech Admission Eligibility Criteria
To get Delhi University B.Tech Admission, the candidates have to pass their 10+2 level from a recognised board. The minimum aggregate marks are as given below (category wise):
General Category: 60 % in four subjects (including Mathematics)
OBC cate

First of all, go through the Delhi University brochure. You will have to fill up the form which released by DU online and make a payment of 250 rupees then cut-off will be released by DU for different courses. Check out the last year's cut-off for different courses which are offered by DU. So, that

Your class 12th percentage is very low. So you can't pursue any course from DU. You must visit private colleges websites and maybe you can get admission in a good college.