Problem J
Above Average

Input

The first line of standard input contains an integer $1 \le C \le 50$, the number of test cases. $C$ data sets follow. Each data set begins with an integer, $N$, the number of people in the class ($1 \le N \le 1000$). $N$ integers follow, separated by spaces or newlines, each giving the final grade (an integer between $0$ and $100$) of a student in the class.

Output

For each case you are to output a line giving the percentage of students whose grade is above average, rounded to exactly $3$ decimal places.

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

40.000%
57.143%
33.333%
66.667%
55.556%