diff --git a/1ano/2semestre/poo/src/aula03/Grades.java b/1ano/2semestre/poo/src/aula03/Grades.java
index 4af54d7..c3426a4 100644
--- a/1ano/2semestre/poo/src/aula03/Grades.java
+++ b/1ano/2semestre/poo/src/aula03/Grades.java
@@ -3,7 +3,7 @@ package aula03;
 import java.util.Scanner;
 import utils.UserInput;
 
-// Solução do exercício 4
+// Solução do exercício 4 com o utilizador a introduzir as notas individualmente
 
 public class Grades {
     private static final Scanner sin = new Scanner(System.in);
diff --git a/1ano/2semestre/poo/src/aula03/GradesRandom.java b/1ano/2semestre/poo/src/aula03/GradesRandom.java
new file mode 100644
index 0000000..3ee3ad8
--- /dev/null
+++ b/1ano/2semestre/poo/src/aula03/GradesRandom.java
@@ -0,0 +1,24 @@
+package aula03;
+
+
+// Solução do exercício 4 com notas aleatórias
+
+import java.util.Random;
+import java.util.Scanner;
+
+public class GradesRandom {
+    private static final Scanner sin = new Scanner(System.in);
+    private static final Random rand = new Random();
+    
+    public static void main(String[] args) {
+        System.out.print("Quantos alunos tem a turma? ");
+        int studentCount = sin.nextInt();
+
+        System.out.println("NotaT  NotaP  Pauta");
+        for (int i = 0; i < studentCount; i++) {
+            double notaT = rand.nextDouble(0, 20);
+            double notaP = rand.nextDouble(0, 20);
+            System.out.printf("%5.1f  %5.1f  %5d\n", notaT, notaP, (notaT < 7 || notaP < 7) ? 66 : (int) Math.round(0.4 * notaT + 0.6 * notaP));
+        }
+    }
+}