using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var KD = new List<Tuple<double, double>>();

        for (var i = 0; i < 101; i++) {

            var r = new Random();

            KD.Add(Tuple.Create((double)r.Next(1, 20), (double)r.Next(1, 20)));

        };

        var avgOfAvgs = KD.Select(k => k.Item1/ k.Item2).Average();

        var normAvg = (KD.Sum(k => k.Item1) / KD.Sum(k => k.Item2));

        Console.WriteLine(avgOfAvgs);

        Console.WriteLine(normAvg);

    }

}