using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("entrada:");

        int n = int.Parse(Console.ReadLine());

        double media;

        for (int i=1; i<=n; i++){

            string[] vet = Console.ReadLine().Split(' ');

            double n1 = double.Parse(vet[0]);

            double n2 = double.Parse(vet[1]);

            double n3 = double.Parse(vet[2]);

            media = (n1 + n2 + n3) /3;

            Console.WriteLine(media.ToString("f1"));

        }

    }

}