diff --git a/optimus/outliers/abstract_outliers_bounds.py b/optimus/outliers/abstract_outliers_bounds.py
index 57b7586d..7ce56f72 100644
--- a/optimus/outliers/abstract_outliers_bounds.py
+++ b/optimus/outliers/abstract_outliers_bounds.py
@@ -128,7 +128,7 @@ def non_outliers_count(self):
         """
         col_name = self.col_name
         return self.df.rows.select(
-            (F.col(col_name) <= self.upper_bound) | (F.col(col_name) >= self.lower_bound)).count()
+            (F.col(col_name) <= self.upper_bound) & (F.col(col_name) >= self.lower_bound)).count()
 
     @abstractmethod
     def info(self, output: str = "dict"):