Introduction to Probability
Year 3 students begin exploring chance by describing the likelihood of everyday events using words such as certain, likely, unlikely, and impossible.
What You Need to Know
Key Concept Diagram
Probability describes how likely it is that an event will happen
Events can be described as impossible, unlikely, equally likely, likely, or certain
The more times an experiment is repeated, the closer results get to expected outcomes
A simple probability experiment, like tossing a coin, has equally likely outcomes
Key Vocabulary
Chance
The likelihood that an event will occur
Certain
An event that will definitely happen (probability of 1)
Impossible
An event that cannot happen (probability of 0)
Equally likely
Two outcomes that have the same chance of occurring
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
Which word best describes the chance of rolling a 7 on a standard 6-sided die?
Question 2
A bag contains 5 red balls and 1 blue ball. Picking a red ball is…
Question 3
When you toss a fair coin, getting heads is…
Key Concepts Summary
- ●Probability describes how likely it is that an event will happen
- ●Events can be described as impossible, unlikely, equally likely, likely, or certain
- ●The more times an experiment is repeated, the closer results get to expected outcomes
- ●A simple probability experiment, like tossing a coin, has equally likely outcomes