The boy in gray is taking pictures of his friend in the striped sweatshirt doing tricks on his skateboard .
It is probable that a boy takes photos of his brother trying new tricks on his new skateboard .
Chances are slight that a boy takes photos of his brother trying new tricks on his new skateboard .
It is probable that a boy takes photos of his brother trying new tricks on his new skateboard .
A boy takes photos of his brother trying new tricks on his new skateboard .