I am interested in taking up Science without Mathematics in Class XI. However, I have not scored well in my Class X boards.

What is important while taking a decision to take up a particular course or field of study is what subject are you interested in and secondly what profession have you decided to take up in future. If you are not interested in a particular subject but you take up that subject for your studies you would definitely not put in your best efforts to be successful in that subject rather you would just try to pass in that subject and that would not help you . Also our education system is more obsessed with marks but good marks does not guarantee you should be successful in professional life classic example of this is our master blaster Sachin Tendulkar he has not completed 10th std but he invested his energy and time in his passion cricket . Also practically speaking in the professional world I have seen many people who have not got good marks during their school and college but they choose a career which is their passion and have done very well. So what matters is if you are interested in science you can still pursue science in degree . Many colleges offer degree courses which does not have maths the only concern you migh face is for 11th & 12th Standard you might have to take maths along with the science subjects but after 12th you can take up a degree course which does not have maths there are several courses like :

B.Sc.- Chemistry
B.Sc. - Bio-Technology
B.Sc. - Botany
B.Sc.- Bio-Chemistry
Bachelor of Agriculture (B.Sc. (Agriculture))
Bachelor of Ayurvedic Medicine & Surgery (B.A.M.S.)
Bachelor of Dental Surgery (B.D.S.)
Bachelor of Fisheries Science (B.F.Sc. - B.Sc. (Fisheries))
Bachelor of Home Science (B.A. - B.Sc. (Home Science))
Bachelor of Homeopathic Medicine and Surgery (B.H.M.S.)
Bachelor of Medicine and Bachelor of Surgery (M.B.B.S.)
Bachelor of Nursing (B.Sc. (Nursing))
Bachelor of Pharmacy (B.Pharm)
Bachelor of Physiotherapy (B.P.T.)
Bachelor of Veterinary Science & Animal Husbandry (B.V.Sc.)
Certified Course in Environment Awareness
Certificate in Clinical Psychology

So take some time to assess what you are interested in and what career you want to take up and then you can take a decision about your future studies . All the best !

Thats okay, you can study Bio science i.e., Physics, Chemistry and Biology

If you are taking science without maths ...physics will be comparatively tuff for u than those who preferred maths in 11th... because many topics from maths would be needed to answer the questions of physics....it's only been 2 days dat my classes had been started .....n presently I am a PCB student but I will soon be changing to PCM since the school has given a week to change the subjects.....so it's better if u take maths otherwise u will face some difficulties in physics....