import java.util.*;
import java.lang.*;
import java.io.*;
class Ideone
{
{
// среднее арифметическое - сумма всех чисел деленная на их количество
int[] numbers = {5, 8, 12, -18, -54, 84, -35, 17, 37};
double average = 0;
if (numbers.length > 0)
{
double sum = 0;
for (int j = 0; j < numbers.length; j++) {
sum += numbers[j];
}
average = sum / numbers.length;
}
}
}
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