Record count from different table

I am trying to count the number of questions in each subject and then
display the question count for each subject next to the subject name:

Model
has_many :questions

Controller
def index
    @subjects = Subject.order(:title)
    @question_number = Question.find(???).count
    end
  end

View
<a href="/.../<%= subject.id %>"><%= subject.title %> (<%=
@question_number %>)</a>

The questions table has a subject_id attribute and this is what I want
to query on

Can't understand how to find the count for each subject in the @subjects
hash and then display with the associated subject

Dave

<%= subject.questions.count %> doesn't work?

Thanks, was overthinking it!

Dave