Also depends on the school it's in, how people do in the subject raw-marks wise etc
For instance, we were told by a lecturer that the school of management does not scale according to a fixed bell-curve "standard" whilst other schools do, they simply adjust the marks according to how well people did vs how well people should have gone and account for any major difficulties in teh assessment that messed people up, thing slike that.
Other schools may follow a fixed bell curve, others simply try to achieve a minimum number of pass marks etc. Some schools scale so negligibly it's almost non-existent.