Street vendors make sales on the sidewalk while cars pass on the busy city streets beside them .
It is impossible that people passing by in cars are curious about the goods being sold on the sidewalk .
Chances are about even that people passing by in cars are curious about the goods being sold on the sidewalk .
It is impossible that people passing by in cars are curious about the goods being sold on the sidewalk .
People passing by in cars are curious about the goods being sold on the sidewalk .