Hi aspirant,

Central board of secondary education conducted the improvement examination for the candidates in order to give them a fair chance to write the examination in case they were not satisfied with the marks allotted to them through the internal assessment. Now as the name suggests the examination was conducted if there could be any upgrade in the marks of the candidates what if they get lesser than the original marks will be retained and will be mentioned in the the marksheet of the student. So you need not to worry as your original marks would be displayed on your mark certificate.

Hope it helps!!