Sitting at a table with beer empty beer mugs on it one brother is has a birthday cake sliced with sprinkler lit up while the younger brother is smiling with his eyes closed .
There is a better than even chance that a pair of brothers celebrate their birthdays together .
It is impossible that a pair of brothers celebrate their birthdays together .
There is a better than even chance that a pair of brothers celebrate their birthdays together .
A pair of brothers celebrate their birthdays together .