import java.util.Random;
public class TwoDArray
{
	public static double colAvg (int[][] a, int c) {
		double sum=0;
		for (int i=0; i<a.length; i++)
			sum+=a[i][c];
		return sum/a.length;
	}
	public static double rowAvg (int[][] a, int r) {
		double sum=0;
		for (int i=0; i<a[r].length; i++)
			sum+=a[r][i];
		return sum/a[r].length;
	}

   public static void main (String[] args)
   {
      int[][] table = new int[5][10];
      Random rnd = new Random();
      

      // Load the table with values
      for (int row=0; row < table.length; row++)
         for (int col=0; col < table[row].length; col++)
//            table[row][col] = row * 10 + col;
			table[row][col] = rnd.nextInt(100);

      // Print the table
      for (int row=0; row < table.length; row++) {
         for (int col=0; col < table[row].length; col++)
            System.out.print (table[row][col] + "\t");
         System.out.println();
      }
      
      System.out.println(rowAvg(table, 3));
      System.out.println(colAvg(table, 6));
   }
}