gistfile1.rb

module AssignmentsHelper
  def assignment_statistics_probability
    # (@assignments.map {|assignment| assignment.probability_grade }.inject(:+) / (@assignments.length.to_f * 12)) * 100
    (@assignments.collect(&:probability_grade).sum / (@assignments.length.to_f * 12)) * 100
  end
  def assignment_statistics_geometry
    (@assignments.map {|assignment| assignment.geometry_grade }.inject(:+) / (@assignments.length.to_f * 12)) * 100
  end
  def assignment_statistics_weeks
    @assignments.length
  end
end