백준 #4344

python

n = int(input())
result = []

for i in range(n):

    input_list = list(map(int, input().split()))
    student = input_list[0] # 맨 앞 요소
    grade = input_list[1:] # 두번째 요소부터

    avg = sum(grade)/student
    count = 0

    for j in grade:
        if j > avg:
            count += 1

    percentage = '{:.3f}%'.format(round(count/student*100, 3))
    result.append(percentage)

for i in result:
    print(i)