fix spelling

cw/cw.tex

@@ -146,7 +146,7 @@
 
 	\subsection*{4.3}
 	Our random value is  $R = u-bit long digit$ which means that it has $2^u$ possible values.
-	And since we know that $q$ balls into $p$ holes a colision is bound to happend at the probability of $\frap{q^2}{2p}$ we can calculate:
+	And since we know that $q$ balls into $p$ holes a colision is bound to happend at the probability of $\frac{q^2}{2p}$ we can calculate:
 	$$\frac{q^2}{2(2^u)}\gt\frac{1}{2}\iff q\gt 2^{\frac{u}{2}}$$
 
 	\subsection*{4.4}