public class Test {

	public void printAverages(String [ ] theNames, double [ ] theAverages) {
	
		// use System.out.print to print one name followed by the average, one line per student.
	
		for (int i = 0; i < theNames.length; i ++){
			System.out.println(theNames[i] + "\t" + String.valueOf(theAverages[i])); 
		}
	}

	public double average (int [] x) {
	
		double sum = 0;
		for (int i = 0; i < x.length; i++){
			sum = sum + (double) x[i];
		}
		return sum/(double)x.length;
	
	}

	public static void main ( String [] args ) {
	
		Test t = new Test();
	
		int grades[ ][ ] = { { 80, 72, 93} , { 92, 76, 90} , { 40, 20, 80} } ;
	
		String names [ ] = { "John X", "Mary Y", "Lesley Z"};
	
		double averages[ ] = new double [names.length];
	
		// calculate the average for each student i and assign it to averages
	
		for (int i = 0;i<names.length;i++){
			int[] studentGrades = new int[3];
			for (int j = 0; j < 3;j++){
				studentGrades[j] = grades[i][j];
			}
			averages[i] = t.average(studentGrades);
		}
	
		t.printAverages(names, averages);
	
	} // end of main
} // end of class Test