#include<stdio.h>

#include<string.h>

#include<string>

#include<iostream>

#include<algorithm>

#include<math.h>

#include<stdlib.h>

using namespace std;

#define LL long long

#define M 100010

#define inf 0x7f7f7f7f

#define PI 3.1415926

#define mod 1000000007

int n,m;

int a[];

void dfs()

{

}

int main()

{

    scanf("%d",&n);

    while(n--)

    {

        int sum=,ave=;

        scanf("%d",&m);

        for(int i=;i<m;i++)

        {

            scanf("%d",&a[i]);

            sum+=a[i];

        }

        ave=sum/;

        sort(a,a+m);

        if(sum%||ave<a[m-]||m<)

        {

            printf("no\n");

            continue;

        }

    }

}