Update ConcentrationCO2.Rmd

module3/exercice3/ConcentrationCO2.Rmd

-title: 'Autour du Paradoxe de Simpson '
-author: "Salem Zeiny"
-output:
-html_notebook: default
-pdf_document: default
+---
+title: "Autour du Paradoxe de Simpson"
+author: "NicholasParadza"
+output: 
+  pdf_document:
+    latex_engine: xelatex
+    toc: true
+output_file: "carbonNicholas.pdf"
+output_dir: "module3/exo3"
+---
+
 ---
 
 # Intro