Hi,

you can appear. Candidate who have passed the examination of the CBSE in previous year can apply in succeeding year for improving his/her performance in one or more subjects in which he/she had appeared in the previous year..

For the purposes of the byelaws contained in this chapter and in chapter 5, unless there is something repugnant in the subject or context, a 'Private Candidate' means a person who is not a Regular Candidate but, under the provisions of these byelaws, is allowed to undertake and/or appear in the All India/Delhi Senior .

Hope this helps

Wish you luck