Merge pull request #1964 from MindLeaps/feature/ML-1393-count-of-stud…

…ents

app/components/common_components/student_statistics.rb

@@ -6,7 +6,7 @@ def initialize(student_lesson_summaries)
     @total_students = @student_lesson_summaries.count
     @total_attending_students = @student_lesson_summaries.where.not(average_mark: nil).count
     @sum_of_average_marks = @student_lesson_summaries.where.not(average_mark: nil).sum(:average_mark)
-    @average_mark_across_students = @total_attending_students ? (@sum_of_average_marks / @total_attending_students.to_f).round(2) : 0
+    @average_mark_across_students = @total_attending_students.positive? ? (@sum_of_average_marks / @total_attending_students.to_f).round(2) : 0
     @absent_students = @total_students - @total_attending_students
   end