diff --git a/is/UB1/ISUB1.tex b/is/UB1/ISUB1.tex
index f473add..a00a05a 100644
--- a/is/UB1/ISUB1.tex
+++ b/is/UB1/ISUB1.tex
@@ -91,7 +91,7 @@
             \item \begin{enumerate}[(a)]
                 \item possible hands without Spades: ${39\choose 5}=575757$\\
                 hands with exaclty two pairs without Spades: ${13\choose 2}{3\choose 2}^2\cdot 11\cdot 3=23166$\\
-                $\mathds{P}(2\ pairs|\neg Spades)=\frac{23166}{575757}=\frac{168}{4921}\approx 0.0402$\\
+                $\mathds{P}(2\ pairs|\neg Spades)=\frac{23166}{575757}=\frac{198}{4921}\approx 0.0402$\\
                 one pair:\\
                 ${13\choose 1}{3\choose 2}{12 \choose 3}\cdot 3^3=231660$\\
                 $\mathds{P}(1\ pair|\neg Spades)=\frac{231660}{575757}=\frac{1980}{4921}\approx 0.402$