diff --git a/Chapter_03/3-11_intentionalError.py b/Chapter_03/3-11_intentionalError.py
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+++ b/Chapter_03/3-11_intentionalError.py
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+# Exercise 3-11 Inentional Error
+# Learning Objective: Create and fix an error based on indexing a list. 
+myList = ['Zero', 'One', 'Two']
+
+#produces error
+#print(myList[3]); 
+
+#corrected 
+print(myList[-1])