Lesson: Probability: Certain, Possible, Impossible Mathematics
In this lesson, we will learn how to use the words “certain,” “possible,” and “impossible” to describe the probability of an event occurring.
Is this event certain, possible or impossible?
A goat will fly past the window.
Is it possible, impossible, or certain that someone on Earth saw the sun rising in the west this morning?
If there are three red balls and nothing else in a bag, is it certain, possible, or impossible that if I pick out a ball at random it will be red?