#include <stdio.h>
#include <string.h>
#include <iostream>
#include <cstdlib>
#include <string>
#include <vector>
#include <map>
#include <cmath>

using namespace std;

double ave, sd;

int gpa(double scr){
	if(scr >= ave+sd) return 4;
	if(scr >= ave) return 3;
	if(scr >= ave-sd) return 2;
	return 1;
}

int main(int argc, char **argv){
	cout << "MAKING THE GRADE OUTPUT" << endl;
	int n;
	cin >> n;
	while(n--){
		int stu, tes, adjTes;
		cin >> stu >> tes;
		if(tes <= 2) adjTes = tes;
		else adjTes = tes-1;
		double scr[100]; 
		int bon[100], abc[100];
		for(int i = 0; i < stu; i++){
			int sum = 0, mn = 101;
			for(int j = 0; j < tes; j++){
				int tmp;
				cin >> tmp;
				sum += tmp;
				if(tmp < mn) mn = tmp;
			}
			if(tes > 2) sum -= mn;
			scr[i] = sum * 1.0 / adjTes;
			cin >> bon[i] >> abc[i];
		}
		ave = 0, sd = 0;
		for(int i = 0; i < stu; i++) ave += scr[i];
		ave /= stu;
		for(int i = 0; i < stu; i++) sd += (scr[i]-ave)*(scr[i]-ave);
		sd = sqrt(sd/stu);
		if(sd < 1) sd = 1;
		double avp = 0;
		for(int i = 0; i < stu; i++){
			double fin = scr[i] + 3 * (bon[i]/2);
			int pnt = gpa(fin);
			pnt -= abc[i]/4;
			if(!abc[i]) pnt++;
			if(pnt>4) pnt=4;
			if(pnt<0) pnt=0;
			avp += pnt;
		}
		avp /= stu;
		printf("%.1lf\n", avp);
	}
	cout << "END OF OUTPUT" << endl;
	return 0;
}