diff --git a/Week03/weighted_umut_sahin.py b/Week03/weighted_umut_sahin.py
new file mode 100644
index 0000000..a51b4e6
--- /dev/null
+++ b/Week03/weighted_umut_sahin.py
@@ -0,0 +1,9 @@
+import random
+
+def weighted_srs(data, n, weights, with_replacement = False):
+
+    if with_replacement == True or weights != None:
+        sample = random.choices(data, k = n, weights = weights)
+    else:
+        sample = random.sample(data, n)
+    return sample