A motorcyclist stops at an empty crosswalk , while thirty or forty motorcycles and bicycles sit parked in the street beside him .
There is a better than even chance that a motorcycle is going to join a group of motorcycles .
There is a better than even chance that a motorcycle is going to join a group of motorcycles .
It is improbable that a motorcycle is going to join a group of motorcycles .
A motorcycle is going to join a group of motorcycles .