\begin{center}\begin{tikzpicture}[yscale=20,xscale=0.5]\draw[thick,->] (0,0) -- (21,0) node[right] {$k$};\draw[thick,->] (0,0) -- (0,0.25) node[right] {$\probavar{X}{k}$};\foreach \y in {0.05,0.1,0.15,0.2}\draw[gray!20] (20,\y) -- (0,\y) node[black,left,scale=0.8] {\y};draw (0,0.05)--(0,-0.05);\node[below,scale=0.8] at (0.5,0) {0};\fill[green!50!black] (0.2,0) rectangle+(0.6,     0.000798);draw (1,0.05)--(1,-0.05);\node[below,scale=0.8] at (1.5,0) {1};\fill[green!50!black] (1.2,0) rectangle+(0.6,     0.006839);draw (2,0.05)--(2,-0.05);\node[below,scale=0.8] at (2.5,0) {2};\fill[green!50!black] (2.2,0) rectangle+(0.6,     0.027846);draw (3,0.05)--(3,-0.05);\node[below,scale=0.8] at (3.5,0) {3};\fill[green!50!black] (3.2,0) rectangle+(0.6,     0.071604);draw (4,0.05)--(4,-0.05);\node[below,scale=0.8] at (4.5,0) {4};\fill[green!50!black] (4.2,0) rectangle+(0.6,     0.130421);draw (5,0.05)--(5,-0.05);\node[below,scale=0.8] at (5.5,0) {5};\fill[green!50!black] (5.2,0) rectangle+(0.6,     0.178863);draw (6,0.05)--(6,-0.05);\node[below,scale=0.8] at (6.5,0) {6};\fill[green!50!black] (6.2,0) rectangle+(0.6,     0.191639);draw (7,0.05)--(7,-0.05);\node[below,scale=0.8] at (7.5,0) {7};\fill[green!50!black] (7.2,0) rectangle+(0.6,     0.164262);draw (8,0.05)--(8,-0.05);\node[below,scale=0.8] at (8.5,0) {8};\fill[green!50!black] (8.2,0) rectangle+(0.6,     0.114397);draw (9,0.05)--(9,-0.05);\node[below,scale=0.8] at (9.5,0) {9};\fill[green!50!black] (9.2,0) rectangle+(0.6,     0.065370);draw (10,0.05)--(10,-0.05);\node[below,scale=0.8] at (10.5,0) {10};\fill[green!50!black] (10.2,0) rectangle+(0.6,     0.030817);draw (11,0.05)--(11,-0.05);\node[below,scale=0.8] at (11.5,0) {11};\fill[green!50!black] (11.2,0) rectangle+(0.6,     0.012007);draw (12,0.05)--(12,-0.05);\node[below,scale=0.8] at (12.5,0) {12};\fill[green!50!black] (12.2,0) rectangle+(0.6,     0.003859);draw (13,0.05)--(13,-0.05);\node[below,scale=0.8] at (13.5,0) {13};\fill[green!50!black] (13.2,0) rectangle+(0.6,     0.001018);draw (14,0.05)--(14,-0.05);\node[below,scale=0.8] at (14.5,0) {14};\fill[green!50!black] (14.2,0) rectangle+(0.6,     0.000218);draw (15,0.05)--(15,-0.05);\node[below,scale=0.8] at (15.5,0) {15};\fill[green!50!black] (15.2,0) rectangle+(0.6,     0.000037);draw (16,0.05)--(16,-0.05);\node[below,scale=0.8] at (16.5,0) {16};\fill[green!50!black] (16.2,0) rectangle+(0.6,     0.000005);draw (17,0.05)--(17,-0.05);\node[below,scale=0.8] at (17.5,0) {17};\fill[green!50!black] (17.2,0) rectangle+(0.6,     0.000001);draw (18,0.05)--(18,-0.05);\node[below,scale=0.8] at (18.5,0) {18};\fill[green!50!black] (18.2,0) rectangle+(0.6,     0.000000);draw (19,0.05)--(19,-0.05);\node[below,scale=0.8] at (19.5,0) {19};\fill[green!50!black] (19.2,0) rectangle+(0.6,     0.000000);draw (20,0.05)--(20,-0.05);\node[below,scale=0.8] at (20.5,0) {20};\fill[green!50!black] (20.2,0) rectangle+(0.6,     0.000000);\end{tikzpicture}\\\textbf{Cas ou $\pmb{n=20}$ et $\pmb{p=0,3}$}\end{center}