Solution: Calculate Average Score by Reading a File

def cal_avg_score(file_name)
  file_content =  File.read(file_name)
  array = []
  
  file_content.split("\n").each do |line|
    array << line.to_i	
  end
  the_average = 0
  the_sum = array.inject{|sum,x| sum + x }
  the_average = the_sum * 1.0 / array.size if the_sum
  the_average = the_average.round(1) if the_average
  
  return the_average
end