A young woman wearing a black tank top is listening to music on her MP3 player while standing in a crowd .
Chances are about even that the young woman is listening to classical music on her MP3 .
It is highly unlikely that the young woman is listening to classical music on her MP3 .
Chances are about even that the young woman is listening to classical music on her MP3 .
The young woman is listening to classical music on her MP3 .