Diploma

You can fill up the form of DU available in May syllabus:
Mathematics
1. Arithmetic Geometric and Harmonic Progression
2. Binomial Expansion
3. Matrices, Elementary Operations Rank of Matrix
4. Conic Sections (Parabola, Ellipse, A Hyperbola)
5. Method of Differentiation
6. Partial Differentiation
7. Integra

You have to go for the lateral entry process in any college. Go to the college site, and you will get to know what is the criteria of the lateral entry.

For engineering courses, Maths is an important subject to get admission. Without Maths as a subject, one cannot get admission for engineering courses. For Diploma courses also Maths is important.

No, you cannot practice with a Diploma. You need to have a LLB Degree in order to practice. Most places, including private and government require you to have a LLB Degree. However, certain paralegal work or research based work may be hiring people Diploma holders. But, full time lawyers need to have

Students who have passed class 10th are eligible to pursue this course. This course can also be pursued after 10+2 Science stream schooling too (Mathematics group). Seats will be allotted to deserving students on the basis of marks scored by them in 10th board examination (usually in Mathematics and