Thanks verysuperkiasu, can i know what average scores and standard deviation for 2011 is for 4 subjects?

if my son get the following resutls for psle on 2011，


english：79
math：98
science：95
mother tongue：92

what will be his aggregate score，and which secondary schools would he get to choose？ :? :? :? :? :? :udaman: :udawoman: