diff --git a/Arrays.java b/Arrays.java
index 9c74939..e3fd120 100644
--- a/Arrays.java
+++ b/Arrays.java
@@ -126,8 +126,15 @@ public class Arrays {
      * @return Ein eindimensionales Array mit den Zeilensummen
      */
     public int[] rowSum( Wuerfel[][] pArray ) {
-        // TODO: implementieren
-        return null;
+        int[] rowSum = new int[pArray.length];
+        for (int i = 0; i < pArray.length; i++) {
+            for (Wuerfel w : pArray[i]) {
+                if (w != null) {
+                    rowSum[i] += w.getAugenzahl();
+                }
+            }
+        }
+        return rowSum;
     }
 
     /**