A waitress is performing in a restaurant with her arms spread out and a top hat in her left hand .
There is a better than even chance that a waitress in a blue uniform is performing in a restaurant .
There is a better than even chance that a waitress in a blue uniform is performing in a restaurant .
It is improbable that a waitress in a blue uniform is performing in a restaurant .
A waitress in a blue uniform is performing in a restaurant .