input: from typing import List
  
  def averageMatrix(matrix: List[List[float]]) -> float:
      """ Calculate the average of the elements in a 2-dimensional array.
      >>> averageMatrix([[3,2,6], [8,5,9], [4,7,1]])
      4.775
      """
output:     
      total = 0
      count = 0
      for row in matrix:
          for element in row:
              total += element
              count += 1
      return total / count
  