
A total of 5965 NUS students, or 24.2% of the full-time undergraduate population, are foreigners.
Most of the foreign students congregate in Science and Engineering. The worst-affected courses are:
Industrial and Systems Engineering (206 out of 383; 53.8%)
Electrical and Computer Engineering (730 out of 1484; 49.2%)
The rest of the Science and Engineering courses average about 20-30% while Arts courses weigh in at less than 10%.
read for details : http://www.tremeritus.com/2013/05/08/foreign-students-capped-at-20-or-24-in-nus/