public class duoweishuzu {

public static void main(String[] args)

{

int[][]scores=

{

{82,90,91},
{68,72,64},
{95,91,89},
{67,52,60},
{79,81,85},
};
double average = 0;
double temp = 0;
double AllAverage;
for (int[] ns:scores)

{

double sum = 0;
for (int m:ns)

{

sum = sum + m;
}

average = (double) (sum/3);
temp = temp + average;

}

AllAverage = temp/5;
System.out.println(AllAverage);

}

}