diff --git a/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 4.md b/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 4.md
index 9ddf5d252..9ea16afde 100644
--- a/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 4.md	
+++ b/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 4.md	
@@ -30,7 +30,7 @@ Background count 56 2 minutes - 0.48
 | 2066                |                |
 | 3448                |                |
 | 7367                |                |
-| 1k + 3k             |                |
+| 1k + 3k             | 431            |
 | 2000+3000           | 406            |
 | 3000+7000           | 323            |
 | 2000+7000           | 357            |