Class 12-science

Hello Mamatha,
The ideal solution to your problem is getting yourself a good mentor, who can clarify your concepts and train you better to score better. For mathematics, you can thoroughly understand the solved examples, provided in each chapter. Based on this, solve as many problems as possible to clarify your concepts.
Physics, on the other hand is a bit different, wherein you need to understand the theoretical concepts as well. For each of the chapters, you can try searching for videos, which can explain the concepts to you in a simpler way.
With mathematics, you can solve as many problems as possible to clarify the concepts better.
I hope it helps. If you have any further questions, kindly revert.

MAM- Master of Applied Management
MAM
Students who have passed 12th Science stream can also choose this course, which is related to business administration. MAM is a five year long course. It is like MBA (Master of Business Administration). This course is more or less a combination of BBA (Bachelor of Business Administration) and MBA. So, the duration of MAM course is 5 years which is the time that you will take to complete BBA and MBA both, normally. The job prospects are excellent. This course is internationally recognized and passed out students can get jobs in managerial posts in companies and business houses.
MCM- Master of Computer Management
MCM
Again a good course that students who have passed 12th Science can pursue. MCM is a five year long course. It is similar to doing BCA (Bachelor of Computer Applications) and MCA (Master of Computer Applications). If you do BCA and MCA both, as it is done normally, it will take 5 years. So does MCM. This course which is a combination of BCA, MCA and management also take only 5 years! Job prospect is also very bright in this field. Students will easily get jobs in software industry and other computer related fields.

Hello Vimal,
* After completing 12th in Computer Science, you may opt for degree courses such as :
1) B.Sc in Computer Science / Information Technology : -
[ Eligibility : To pursue B.Sc, you need to score a minimum of 50% marks in 12th with Science (Physics, Chemistry, Maths) from any recognized board. The admission is based on the marks obtained in qualifying exam. The cut off marks varies from year to year. ]
2) B.E/B.Tech in Computer Science engineering / Information Technology : -
[ Eligibility : To pursue B.E. / B.Tech, you need to complete 12th with minimum 60% (Physics, Mathematics and Chemistry) from recognized board to join good college. However, there are colleges which take students who have scored 45% - 50%. Your age must be between 17-23 years. You need to appear in entrance exam. ]
3) BCA : -
[ Eligibility : To pursue BCA, you need to pass 12th standard with at least 50% in any stream with Mathematics as a compulsory subject. ]
* Along with the degree course you choose, you may opt for certificate courses to enhance your knowledge and career opportunities. Below is the list of some of the courses :
-Web designing
-Graphic Designing
-Game Design / Development
-Cyber Security / Internet security
-DOEACC
-Microsoft Certifications
-Ethical hacking
-DTP
-C and C+
-JAVA
-.NET technologies
-CISCO Certifications
-Tally
-Red Hat Certifications
-LINUX
-Oracle
Choose the course which matches your interest and skills as it will help you to achieve your long term career goal.
I hope it helps. Please feel free to revert. Click on the thumbs up or mark it as the best, if you found this useful.
Wish you luck.