#include <stdio.h>

#include <stdlib.h>


int main(){

float *result;

int c;

scanf("%d", &c);


int cnt;

result = (float *)malloc(c * sizeof(float));

for(int i = 0 ; i < c ; i++){

scanf("%d", &cnt);

int *number;

float average;

number = (int *)malloc(cnt * sizeof(int));

int temp = 0;

for(int j = 0 ; j < cnt ; j++){

int num;

scanf("%d",&number[j]);

temp += number[j];

}

average = (float)temp / cnt;

int cnt_number = 0;

for(int j = 0 ; j < cnt ; j++){

if(number[j] > average)

cnt_number++;

}

result[i] = (cnt_number / (float)cnt) * 100;

free(number);

}

for(int i = 0 ; i < c ; i++)

printf("%.3f%\n",result[i]);


free(result);

return 0;

}


개심심;