Hope you have done well in your exams held till date. I am providing links of previous year's papers held in school for past 4-5 years (with solutions). I hope it will help you to prepare better for the examination.
All the best!
Links for All helpful Resources for class XII Mathematics
Latest Sample Paper by CBSE:
Sample Papers by Directorate of Education (given to every Government School Students): http://amitbajajcrpf.files.wordpress.com/2013/12/12_math_english_2013-page-136-172-for-sp.pdf
(Also check two Sample papers from page number 136 onward)
Previous year’s papers (held in School)