A senior education department official said show cause notices would be issued to schools that have performed poorly to give the reason for the dismal performance.
Son of a manual labourer, Karan Sharma cleared the exams with a 6.8 CGPA.
Delhi had registered a pass percentage of 98.40 per cent last year.
The results can be viewed via the internet on http://www.results.nic.in.
More than 400 students from Ludhiana district have gotten a perfect 10 cumulative grade point average in the class X results declared late this evening.
The change in the Central Board of Secondary Education examination pattern for Class X has not only resulted in a better performance in the citys private schools but also in the government ones.
The CBSE Class X results,declared today,showed an improvement in the region,thanks to changes in the system of evaluation and more liberal grading.
The usual buzz around the Central Board of Secondary Education Class X results,expected to come later this week,is missing this year.