b ul va rog dau coroana

Răspuns:
[tex] \frac{102}{1} \times \frac{3}{204 } \times \frac{19}{9} \times \frac{6}{19} \\ \frac{1}{1 } \times \frac{3}{2} \times \frac{1}{9} \times \frac{6}{1} \\b = \frac{18}{18} [/tex]