> #include <stdio.h>
> int main ()
> {
>   int t,n,i,j;
>   float a[1000],sum,ave,ans;
>   scanf ("%d",&t);
>   for (i=1;i<=t;i++)
>   {
>    sum=ave=ans=0.00;
>    scanf ("%d",&n);
>    for (j=0;j<n;++j)
>    {scanf ("%f",&a[j]);
>     sum+=a[j];}
>    ave=sum/(float)(n);
>    for (j=0;j<n;++j)
>    if (a[j]>ave) ans+=1.00;
>    ans/=(float)(n);
>    ans*=100;
>    printf ("%.3f%\n",ans);
>   }
> return 0;
> }