Delhi University (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 luck.

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 category: 54% in four subjects (including Mathematics)
PH category: 55% in four subjects (including Mathematics)
SC/ST category: Passing marks with Mathematics as one the subjects
Regards.

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 you can get an idea.

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.

Yes, you can pursue graduation from Delhi University. DU provides many courses for different streams. You can download the brochure of Delhi University and you can also check out the last year's cut-off for different courses on Delhi university website.

Yes, Delhi University provides many courses from a different stream. You can download the brochure of Delhi University and you can also check out the last year cut-off for a different course on Delhi university website.

Follow the link below for all the information:
https://www.shiksha.com/science/course/b-sc-hons-in-computer-science-college-of-vocational-studies-sheikh-sarai-delhi-53813

They are different.
B.Sc (Hons.) in Statistics allows you to specialize in the branch of Mathematics that focuses on collecting, analyzing, and presenting a large number of numerical data. There are many practical applications for Statistics, including fields such as Science and Medicine, Government, Business and Education.
Bachelors in Statistics provides the students the fundamental knowledge and skills related to Probability, Mathematical Statistics, Data Analysis and Statistics Computing. BS in Statistics is very flexible and can lead to a career in business, industry or government.