URI Problem (Weighted Averages) 1079:
Weighted Averages is a basic problem on URI online judge for novice problem solver.
You can find details on this Link.

import java.text.DecimalFormat;
import java.util.Scanner;

/**
 * @Author : Muhammad Harun-Or-Roshid
 * @Date : Oct 15, 2016
 * @Time : 1:23:20 PM
 */
public class Uri1079 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int a = 2, b = 3, c = 5;
        for (int i = 0; i < n; i++) {
            double x = sc.nextDouble();
            double y = sc.nextDouble();
            double z = sc.nextDouble();
            System.out.println(toDouble(((x * a) + (y * b) + (z * c)) / (a + b + c)));
        }
    }

    private static double toDouble(double x) {
        DecimalFormat format = new DecimalFormat("#0.0");
        return Double.valueOf(format.format(x));
    }
}