A female child walks down a sidewalk while a male child watches .
Chances are about even that a boy in a blue shirt watches a girl in a green dress walk down a brick sidwalk .
Chances are about even that a boy in a blue shirt watches a girl in a green dress walk down a brick sidwalk .
It is almost certain that a boy in a blue shirt watches a girl in a green dress walk down a brick sidwalk .
A boy in a blue shirt watches a girl in a green dress walk down a brick sidwalk .