jeden

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Korki29
{
    class Matrix
    {
        public double[,] table { get; set; }

        public Matrix(int x, int y)
        {
            table = new double[x, y];
            FillTable();
        }

        public void FillTable()
        {
            var random = new Random();

            for (int x = 0; x < table.GetLength(0); x++)
            {
                for (int y = 0; y < table.GetLength(1); y++)
                {
                    table[x, y] = random.Next(1, 9);
                    Console.Write($"{table[x, y]} ");
                }
                Console.WriteLine();
            }
        }

        public void CheckCol()
        {
            var sumy = new List<double>();
            for (int x = 0; x < table.GetLength(1); x++)
            {
                double sum = 0;
                for (int y = 0; y < table.GetLength(0); y++)
                {
                    sum += table[y, x];
                }
                Console.WriteLine(sum);
                sumy.Add(sum);
            }

            var result = sumy.Max() / table.GetLength(1);

            Console.WriteLine($"\n{result}");
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            var table = new Matrix(5, 5);
            table.CheckCol();
        }
    }
}