/* Easy */ #include #include #include #include #include #include #include #include #include #include using namespace std; typedef long long int64; //typedef __int64 int64; typedef pair PII; #define MP(a,b) make_pair((a),(b)) const int maxn = 1005; const int inf = 0x7fffffff; const double pi=acos(-1.0); const double eps = 1e-8; double a[ maxn ]; int main(){ int T; scanf("%d",&T); while( T-- ){ int n; scanf("%d",&n); double sum = 0; for( int i=1;i<=n;i++ ){ scanf("%lf",&a[i]); sum += a[i]; } double avi = sum/n; int cnt = 0; for( int i=1;i<=n;i++ ){ if( a[i]>avi ) cnt++; } cnt *= 100; printf("%.3lf%%\n",1.0*cnt/(1.0*n)); } return 0; }