Calculating Building Occupants for a MURB

I'm second guessing myself and I'm hoping someone can offer some clarity. I'm trying to calculate the number of Building Occupants for an apartment building. From what I've read in the MURB guideline, Residential Occupancy is calculated using the occupancy densities for the residential dwelling units as follows: 1 bedroom/bachelor = 1 occupant 2 bedrooms = 2 occupants 3 bedrooms = 3 occupants The FTE definition in the LEEDuser glossary states "Residential occupancy should be estimated based on the number and size of units." The confusion for me is around the wording "size of units" ... Does this mean the same thing as the LEED MURB definition I states above (1 bedroom = 1 occupant, etc) or does it mean, for instance, that depending on the size of the room that more than 1 occupant would be counted? As in for a larger one bedroom apartment you would count 2 occupants? Thanks in advance!