Complex sentence: Vidyashala's students number about 400 and fall in the age group of 13-18 years, with many hailing from outside Karnataka, particularly from Andhra Pradesh, Tamil Nadu, West Bengal and Maharashtra.
Split into simpler sentences: Vidyashala's students number about 400 and fall in the age group of 13-18 years. Many of those who hail from outside Karnataka are from Andhra Pradesh, Tamil Nadu, West Bengal and Maharashtra.