Dont know. But for that year of 2011, there were over 300 people queuing up for written test. I heard afterwards that there are about 10 places as there are 2-3 places left each for 4 classes. But if there is redudant students from previous P.1, that will be different.
I did not call the school when receiving the waiting list letter bc I guess by that time that the chance is slim.