Revision is an important aspect of preparing for any examination, especially for a subject like Economics Optional that involves mathematical and statistical concepts. To ensure effective revision of the mathematical and statistical aspects of Economics Optional, the following strategies can be employed:

1. Understand the Syllabus:
- Familiarize yourself with the syllabus and identify the specific mathematical and statistical topics included in the Economics Optional.
- This will help you create a structured plan for revision and focus on the relevant areas.

2. Create a Study Schedule:
- Develop a realistic study schedule that allocates sufficient time for revising mathematical and statistical concepts.
- Divide your study sessions into smaller, manageable blocks to enhance concentration and retention.

3. Review Class Notes and Lecture Material:
- Go through your class notes and lecture material to refresh your understanding of the mathematical and statistical concepts covered.
- Pay attention to any additional explanations or examples provided by the instructor.

4. Practice Numerical Problems:
- Mathematics and statistics require practice to develop problem-solving skills.
- Solve a wide range of numerical problems from textbooks, previous years' question papers, and supplementary materials.
- Focus on practicing different types of problems to enhance your proficiency.

5. Utilize Online Resources:
- EduRev offers a variety of study materials, including video lectures, notes, and practice questions, specifically designed for UPSC exams.
- Take advantage of these resources to reinforce your understanding of mathematical and statistical concepts.

6. Seek Clarification:
- If you encounter any difficulties or have doubts while revising mathematical and statistical concepts, seek clarification from your professors, classmates, or online forums.
- Clarifying doubts promptly will ensure a stronger foundation in these subjects.

7. Solve Previous Years' Question Papers:
- Solve previous years' question papers to familiarize yourself with the exam pattern and identify the types of mathematical and statistical problems that are frequently asked.
- This will enable you to manage your time effectively during the actual exam.

8. Form Study Groups:
- Forming study groups with classmates who are also preparing for the Economics Optional can be beneficial.
- Discussing mathematical and statistical concepts, solving problems together, and sharing insights can enhance understanding and retention.

9. Review and Revise Regularly:
- Regularly review and revise the mathematical and statistical concepts to reinforce your understanding.
- Allocate specific time slots for revision in your study schedule.

Remember, consistent effort and a systematic approach are the keys to success in revising the mathematical and statistical aspects of Economics Optional. Stay focused, practice regularly, and seek assistance whenever needed. Good luck with your revision!