Science

For B.Sc in economics, you only need 50% in your 10+2. Here is a more information.
Bachelor of Science in Economics or B.Sc Economics is an undergraduate program of 3 years which can be done after completion of 10+2 or equivalent examination. The average annual fee for B.Sc Economics ranges between INR 50,000 to 1 lakh depending on the college.
The program is spread over 6 semesters at an interval of every six months. B.Sc Economics syllabus imparts candidates relevant knowledge about economic analysis, economic fundamentals and principles. After the completion of the course, candidates are equipped with the knowledge of how economic principles are applied in the society, family, government and private sector, business and science.
They can easily avail job opportunities in banking and finance sector along with other career options as well with the average salary package ranging from INR 1.5 LPA to 5 LPA. In this course, candidates are provided with an understanding as how to do analysis in social and political sector by applying economics principles. And, they will understand the production process, distribution techniques and how the consumption of goods and services should be done at different stages.
Best wishes.

Yes, you are eligible. There, science field is not a barrier for you. Bachelor of Business Administration or BBA is a 3-year professional undergraduate course in Business Management, the minimum eligibility for which is class 12th from a recognized educational board with a minimum score of 50%. The course is divided into six semesters and comprises variants like BMS, BBM and BBS. It can also be done through Correspondence/ Distance mode and admission to the same is based on entrance tests carried out by different colleges and universities.
Some such entrance tests conducted by respective universities for admission into BBA course are:
IPU-CET
SET
AIMA UGAT
BBA course equips you with the right knowledge and skills in business and management and imparts knowledge of the principles which are perfect for a career in the corporate world. A degree in Business Administration solidifies your base for your future business and management career goals. Successful graduates of this course can opt for a range of jobs from sectors like finance, marketing, sales, management, government and education.
The average tuition fee charged for the course in India ranges between INR 1 lakhs to 2.5 lakhs. Some of the top institutes which provide admission to candidates into the 3-year program are as follows:
Indian Institute of Management (IIM), Indore
Christ University, Bangalore
University of Delhi
NMIMS University, Mumbai
Symbiosis International University
Guru Gobind Singh Indraprastha University, Delhi
Sikkim Manipal University

Pass +2 science with a minimum of 50% marks. The candidate should have either the subject combination of (a) Mathematics, Physics and Chemistry or (b) Biology, Physics and Chemistry at +2 level. Separate application forms are required for each stream.
Applications are invited from eligible candidates for Regional Institute of Education Common Entrance Exam 2018 (CEE)-2018 for the admission to B.Sc B.Ed/B.Sc Ed/BA B.Ed/M.Sc Ed and B.Ed (two-year). Programmes offered by Regional Institutes of Education of NCERT at Ajmer, Bhopal, Bhubaneswar, Mysore and NERIE, Shillong for the academic session 2018-19.
RIE CEE 2018
NCERT is conducting Common Entrance Examination 2018. It is for RIEs (Ajmer, Bhopal, Bhubaneswar, Mysore, and Shillong), Prarambh Haryana, NCERT, New Delhi.
NCERT conducts RIE CEE for centralized online admission process for six (06) courses namely B.Sc B.Ed, BA B.Ed, M.Sc B.Ed, M.Ed, and B.Ed-M.Ed integrated.
Interested candidates can check all the details of RIE NCERT CEE 2018 admission like application form, eligibility criteria, counselling procedure, etc., from this page given below.