#include <stdio.h>
int main(){
    int c,n,i;
    float soma,s;
 
    scanf("%d",&c); //ler quantidade de turmas
    while(c > 0){
            scanf("%d",&n); //ler quantos alunos
            float num[n];
            soma = 0;
            s = 0;
 
			//leitura das notas
            for(i = 0; i < n; i++){
                    scanf("%f", &num[i]); //ler nota
                    soma += num[i];
            }
            soma /= n; //calcula média
 
            //conta alunos acima da média
            for(i = 0; i < n; i++){
                    if(num[i] > soma) s++;
            }
            printf("%.3f%\n",s/n*100);
            c--;
    }
    return 0;
}

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5
5 50 50 70 80 100
7 100 95 90 80 70 60 50
3 70 90 80
3 70 90 81
9 100 99 98 97 96 95 94 93 91