# 5조 실습문제
import numpy as np
import matplotlib.pyplot as plt

c = int(input('케이스 개수 입력 '))

for i in range(c) :
    arr = list(input().split())
    N = float(arr[0])
    scores = np.array(arr[1:],int)
    avg = scores.mean()
    
    num = np.where(scores > avg)[0].size
    print(round(num/N*100,3),"%")
    
    x = np.arange(scores[np.argmin(scores)],scores[np.argmax(scores)]+10,10)
    y = list()
    for score in x :
        tmp = np.where(scores == score)[0].size
        y.append(tmp)
    
    plt.bar(x,y)
    plt.show()
    y.clear()

# 6조 1
import numpy as np

vec = np.array([2,4,6,8,9,15],int)

two_dim_vec = vec.reshape(2,3)

print(two_dim_vec)

#6조 2

import numpy as np
A = np.array([[2,3],[5,6]])
B = np.array([4,5])
C = np.linalg.inv(A)
ans = C @ B
print(ans)

#6조 3
import numpy as np
arr = list(input().split())
N = int(input())
ages = np.array(arr,int)
M = 24 / N
groups = ages.reshape(-1,N)

for group in groups :
    print(group[np.argmax(group)],group[np.argmin(group)])