Two boys , two girls , strapped in and ready for an amusement park ride .
It is probable that a group of kids are ready to try the tallest roller coaster at the amusement park .
It is impossible that a group of kids are ready to try the tallest roller coaster at the amusement park .
It is probable that a group of kids are ready to try the tallest roller coaster at the amusement park .
A group of kids are ready to try the tallest roller coaster at the amusement park .