diff --git a/src/my_project/interviews/top_150_questions_round_20/add_binary.py b/src/my_project/interviews/top_150_questions_round_20/add_binary.py
new file mode 100644
index 00000000..46931977
--- /dev/null
+++ b/src/my_project/interviews/top_150_questions_round_20/add_binary.py
@@ -0,0 +1,7 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC, abstractmethod
+
+class Solution:
+    def addBinary(self, a: str, b: str) -> str:
+
+        return bin(int(a,2) + int(b,2))[2:]
\ No newline at end of file
diff --git a/tests/test_150_questions_round_20/test_add_binary_round_20.py b/tests/test_150_questions_round_20/test_add_binary_round_20.py
new file mode 100644
index 00000000..bec877d2
--- /dev/null
+++ b/tests/test_150_questions_round_20/test_add_binary_round_20.py
@@ -0,0 +1,11 @@
+import unittest
+from src.my_project.interviews.top_150_questions_round_20\
+.add_binary import Solution
+
+class AddBinaryTestCase(unittest.TestCase):
+
+    def test_add_binary(self):
+        solution = Solution()
+        output = solution.addBinary(a="11", b="1")
+        target = "100"
+        self.assertEqual(output, target)
\ No newline at end of file