text: #Write a function that accepts a 2 Dimensional list of integers and returns the average. 
  #Remember that average = (sum_of_all_items) / (total_number_of_items).
  
  def average_two_list(list_dimensional):
  	total_sum = 0
  	total_numbers = 0
  
  	for each_list in list_dimensional:
  		for number in each_list:
  			total_sum += number
  			total_numbers += 1
  
  	average = total_sum/total_numbers
  	return average
  
  result = average_two_list([[1,2],[3,4]])
  print (result)
  