2. Средноаритметично по редове

using System;
using System.Collections.Generic;
using System.Linq;

namespace Arrays
{
    class Program
    {
        static void Main(string[] args)
        {
            int rows = int.Parse(Console.ReadLine());
            int cols = int.Parse(Console.ReadLine());

            int[,] intMatrix = new int[rows, cols];

            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < cols; col++)
                {
                    intMatrix[row, col] = int.Parse(Console.ReadLine());
                }
            }

            for (int row = 0; row < rows; row++)
            {
                int sum = 0;
                for (int col = 0; col < cols; col++)
                {
                    Console.Write(intMatrix[row, col] + " ");
                    sum += intMatrix[row, col];
                }
                //сумата на реда
                double average = sum * 1.0 / cols;
                Console.WriteLine(average);

            }

        }
}