[BOJ] 4344. 평균은 넘겠지

import java.util.Scanner;

public class Main {
	static Scanner sc=new Scanner(System.in);
	public static void main(String[] args) {
		int T=sc.nextInt();
		for (int t = 0; t < T; t++) {
			int N=sc.nextInt();
			int arr[]=new int[N];
			int sum=0;
			int cnt=0;
			for (int i = 0; i < N; i++) {
				arr[i]=sc.nextInt();
				sum+=arr[i];
			}
			double avg=(double) sum/N;
			for (int i = 0; i < arr.length; i++)
				if(arr[i]>avg) cnt++;
			
			double ans=(double) cnt/N*100;
			System.out.printf("%.3f",ans);
			System.out.println("%");
		}
	}
}