// Page 127 - 128

public class Prog_10_6
{
	public static void main(String[] args)
	{
		int[] scores = {78, 88, 92, 97};
		double avg;
		avg = average (scores, scores.length);
		System.out.println(avg);

	}
	private static double average(int[] grade, int size)
	{
	        double mean;
	        double sum=0;
	        for(int i=0; i<size; i++)
	                sum += grade[i];
	        mean = sum /size;
	        return mean;
	}

}