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diff --git a/Lectures_my/MC_2016/Lecture1/mchrzasz.pdf b/Lectures_my/MC_2016/Lecture1/mchrzasz.pdf
index e92de7e..5bde4e9 100644
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diff --git a/Lectures_my/MC_2016/Lecture1/mchrzasz.tex b/Lectures_my/MC_2016/Lecture1/mchrzasz.tex
index 6f060ef..f3e6ba1 100644
--- a/Lectures_my/MC_2016/Lecture1/mchrzasz.tex
+++ b/Lectures_my/MC_2016/Lecture1/mchrzasz.tex
@@ -519,7 +519,7 @@
\ARROW For 2 random variables we define:
\begin{align}
-E(cx+y)=cE(x)+E(b) \nonumber \\
+E(cx+y)=cE(x)+E(y) \nonumber \\
V(cx+y)=c^2V(x)+V(y)+2c Cov(x,y), \label{p1}
\end{align}
where $Cov(x,y)=E([x-E(x)][y-E(y)])$ is called the covariance.
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diff --git a/Lectures_my/MC_2016/Lecture3/mchrzasz.log b/Lectures_my/MC_2016/Lecture3/mchrzasz.log
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