\begin{figure}[htbp]
\hspace*{-2cm}                                                           
   \includegraphics[scale=0.35]{MEAInitialProb1.pdf}%
\hspace{2mm}%                
    \includegraphics[scale=0.35]{MEA10Prob1.pdf}% 
\hspace{2mm}%             
    \includegraphics[scale=0.35]{MEA20Prob1.pdf}                               

  \caption{Caption}
  \label{fig:Prob1:MEA}
\end{figure}