Yes, you can file RTI application for the details of number of students enrolled in Delhi government schools falling under the other category from the Directorate of Education Government of NCT of Delhi. Delhi Directorate of Education is the department under the education ministry of Delhi Government that manages the city's public school system. Hence, it is a Public Authority u/s 2(h) of RTI Act,2005. Hence, it must provide the requested information u/s 2(f) and 6(1) of RTI Act, 2005 after payment of requisite fees.
To file application for the same please refer https://onlinerti.com/how-to-file-rti-online-for-delhi or https://onlinerti.com/