Class 11

CAT or any other qualifying exams are totally based on quantitative aptitude, data interpretation, Logical reasoning, verbal. Maths is an inherent part of these exams. It is not about is it advisable for somebody like you mentioned to go for CAT or not. Rather it is about whether you 'want' to get into Iims or not because CAT can get you into IIM.

The CPL training eligibility requires you to have maths as a subject for admission. Therefore, it would be a good idea to pursue maths.

Many options are available for you. Since you are in class 8th right now, you should introspect and check what are your interests. Options available to you:-
If you are an ICSE Student then you will have to choose a stream in 9th Class. If you want to know more about ICSE then kindly let me know in the comments. Assuming that you are a CBSE student, you need to choose stream in XI Class:-
Medical
Commerce
Non-Medical
Arts/Humanities
Make a wise decision and remember CBSE has revived its Class X Boards from 2018 Onwards so you will be included in that.

It all depends on what college you wish to join, what is the average cut-off there, would you want to take bifocal courses, this year's results, etc. I feel it's important for you to have an interest and passion for proper planning of your future.

It all depends on what college you wish to join, what is the average cut-off there, would you want to take bifocal courses, this year's results, etc. I feel it's important for you to have an interest and passion for Science as well as proper planning of your future, in either research, medical, engineering or education. Apart from these, going through Science isn't going to help much. Remember dedication, not marks, is the key.

It is not necessary to choose PCM. If you feel that you cannot carry on with maths then you can choose medical field by taking biology as a subject. You can try in medical field and become a doctor. There are different options available where maths is not required.

PCM is the best option for you in class 11th and class 12th. You can work out a strategy to maintain your grasp on maths and make a plan to overcome the shortcomings in chemistry and improvement in Physics. If you plan out your studies, you can achieve your career goals easily.

For physics : H. C. Verma or Arihant. For chemistry : NCERT is best. For Maths : TMH
But the main thing is to go through previous year JEE questions which will give you an idea and many of the questions will clear your misconceptions.

The candidate must have cleared 10+2 Science stream schooling with Physics and Mathematics as the main subjects (age of candidate should not be less than 17 years when the course starts).
* Non Science stream students may pursue the required subjects through NIOS. NIOS schooling can be used to meet the above mentioned requirements. Apart from NIOS, non Science stream students may also pursue the required subjects as private candidates from their respective state boards too!
* The minimum marks required is 50% (may vary from Institute to Institute) aggregate marks.

They check almost everything before they decide on the interviews.