[tex]Probabilitatea=\frac{nr. \ cazurilor \ favorabile}{nr. \ cazurilor \ posibile} \\\\ \hbox{Ai in total 6+9= 15 carti-nr. ce reprezinta cazurile posibile} \\\\ 9 \ carti \ matematica-nr. \ cazurilor \ favorabile \\\\\\ P=\frac{\not9}{\not15} \\\\ \boxed{P=\frac{3}{5}\to 0,6\%}[/tex]