A young man, living in Manhattan, New York, has two girlfriends. One lives to the North, in the Bronx, and
the other lives to the South, in Brooklyn.
He likes both girls equally but can only visit one each weekend. He therefore leaves it to chance and
takes the first train that arrives when he reaches the train station.
Even though the man arrives at a totally random time every Saturday morning and the Brooklyn and Bronx
trains arrive equally often (every ten minutes), he finds himself visiting the girl in Brooklyn on average
nine times out of ten. How could the odds so heavily favor taking the Brooklyn train?
Do you have a suggestion
for this puzzle (e.g. something that should
be mentioned/clarified in the question or solution, bug, typo, etc.)?