One mechanic is sitting on the roof of a school bus with an open door , while the other is standing inside the bus .
Chances are about even that a mechanic is standing of the roof of a truck , another mechanics is in the cab of the truck .
It is impossible that a mechanic is standing of the roof of a truck , another mechanics is in the cab of the truck .
Chances are about even that a mechanic is standing of the roof of a truck , another mechanics is in the cab of the truck .
A mechanic is standing of the roof of a truck , another mechanics is in the cab of the truck .