diff --git a/education/statistics/random-variable.html b/education/statistics/random-variable.html
index ea54b67..65d4118 100644
--- a/education/statistics/random-variable.html
+++ b/education/statistics/random-variable.html
@@ -2,10 +2,22 @@
 title: 隨機變數 (Random Variable)
 description: 
 published: true
-date: 2025-12-28T16:41:51.938Z
+date: 2025-12-28T16:48:42.180Z
 tags: 
 editor: ckeditor
 dateCreated: 2025-12-28T16:41:51.938Z
 -->
 
-<p>1</p>
+<h2><span style="font-family:Arial, Helvetica, sans-serif;">Discrete</span></h2>
+<h3><span style="font-family:Arial, Helvetica, sans-serif;">Probability Mass Function (PMF)</span></h3>
+<p>&nbsp;</p>
+<p>&nbsp;</p>
+<h3><span style="font-family:Arial, Helvetica, sans-serif;">Cumulative Distribution Function (CDF)</span></h3>
+<p>&nbsp;</p>
+<h2>Continuous</h2>
+<h3><span style="font-family:Arial, Helvetica, sans-serif;">Probability Density Function (PDF)</span></h3>
+<p>&nbsp;</p>
+<p>&nbsp;</p>
+<h3><span style="font-family:Arial, Helvetica, sans-serif;">Cumulative Distribution Function (CDF)</span></h3>
+<p>&nbsp;</p>
+<p>&nbsp;</p>