diff --git a/assets/section_1.6_1686904326481_0.edn b/assets/section_1.6_1686904326481_0.edn
index 38491ee..b312d74 100644
--- a/assets/section_1.6_1686904326481_0.edn
+++ b/assets/section_1.6_1686904326481_0.edn
@@ -94,5 +94,124 @@
                                    :height 761.9527999999999}),
                           :page 19},
                :content {:text "Example"},
-               :properties {:color "green"}}],
- :extra {:page 18}}
+               :properties {:color "green"}}
+              {:id #uuid "648c2162-314d-4d4b-a3f6-29e39fdcc83b",
+               :page 18,
+               :position {:bounding {:x1 0,
+                                     :y1 30,
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+                                  {:x1 308.9453125,
+                                   :y1 344.265625,
+                                   :x2 313.90625,
+                                   :y2 368.765625,
+                                   :width 1015.9379999999999,
+                                   :height 761.9527999999999}
+                                  {:x1 431.75,
+                                   :y1 344.265625,
+                                   :x2 436.7109375,
+                                   :y2 368.765625,
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+                                  {:x1 259.4375,
+                                   :y1 352.03125,
+                                   :x2 272.46722412109375,
+                                   :y2 371.53125,
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+                                  {:x1 317.015625,
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+                                   :y2 372.375,
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+                          :page 18},
+               :content {:text "The n events A1, A2, · · · , An are independent if and only if for any subset Ai1 , Ai2 , · · · , Aik ,"},
+               :properties {:color "yellow"}}],
+ :extra {:page 22}}
diff --git a/pages/hls__section_1.6_1686904326481_0.md b/pages/hls__section_1.6_1686904326481_0.md
index f60ba33..7b6dcd4 100644
--- a/pages/hls__section_1.6_1686904326481_0.md
+++ b/pages/hls__section_1.6_1686904326481_0.md
@@ -25,4 +25,9 @@ file-path:: ../assets/section_1.6_1686904326481_0.pdf
   ls-type:: annotation
   hl-page:: 19
   hl-color:: green
-  id:: 648c206e-8ce7-4a74-9ba5-4991d761909f
\ No newline at end of file
+  id:: 648c206e-8ce7-4a74-9ba5-4991d761909f
+- The n events A1, A2, · · · , An are independent if and only if for any subset Ai1 , Ai2 , · · · , Aik ,
+  ls-type:: annotation
+  hl-page:: 18
+  hl-color:: yellow
+  id:: 648c2162-314d-4d4b-a3f6-29e39fdcc83b
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 0cfe755..b5ff0da 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2679,7 +2679,10 @@
 					- ((648c1e7c-ce3f-4aea-bff6-4d35373becbb))
 						- ((648c1ea8-997d-4d93-b7ac-c7a5b9300bed))
 						- Pairwise independence $$\neq$$ Mutually independence
+						- ((648c2162-314d-4d4b-a3f6-29e39fdcc83b))
 						- ((648c206e-8ce7-4a74-9ba5-4991d761909f))
+						-
+					-
 			- LATER 学积分
 			  :LOGBOOK:
 			  CLOCK: [2023-06-03 Sat 17:05:07]--[2023-06-03 Sat 17:05:08] =>  00:00:01