1093: Above Average
[命题人 : ]
题目描述
It is said that 90% of frosh expect to be
above average in their class. You are to provide a reality check.
输入
The first line of standard input contains an integer C, the
number of test cases. C data sets follow. Each data set begins with an integer,
N, the number of people in the class (1 <= N <= 1000). N integers follow,
separated by spaces or newlines, each giving the final grade (an integer
between 0 and 100) of a student in the class.
输出
For each case you are to output a line giving the percentage of students whose grade is above average, rounded to 3 decimal places.
样例输入 Copy
5
5 50 50 70 80 100
7 100 95 90 80 70 60 50
3 70 90 80
3 70 90 81
9 100 99 98 97 96 95 94 93 91
样例输出 Copy
40.000%
57.143%
33.333%
66.667%
55.556%