An older man wearing glasses , a baseball cap , a white shirt and a red vest plays a tuba outside a building .
There is a very good chance that an old man plays his tuba in public to hopefully earn tips .
There is a very good chance that an old man plays his tuba in public to hopefully earn tips .
It is highly unlikely that an old man plays his tuba in public to hopefully earn tips .
An old man plays his tuba in public to hopefully earn tips .