Ruby on Rails

in my models, household has_many :people and people has_one :household
household has a name field, and people has household_id

the closest I got was:
@test = Household.count :all, :group => 'people.household_id', :joins
=> :people

this does group the families together and count the members,
but this has no way of including only families of one
I am assuming that the output from this could be used to get the name
field from households

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