# What are probability / chance / likelihood?

## What is probability?

**Probability tells us how likely something is to happen.**

Probability can be described in words, or more accurately in terms of fractions and percentages.

Probability can also be shown on a

**probability line**:

## Learning about probability

*Mary has these shapes in a box:*

If she puts her hand in the box and takes a shape without looking, what is the probability that she will take out a triangular shape?

If she puts her hand in the box and takes a shape without looking, what is the probability that she will take out a triangular shape?

**spinners**:

*Katy has this spinner.*

The chance of the spinner landing on an even number when she spins it is 3/6, which can be simplified to 1/2.

a) What is the chance of her getting a square number?

b) What is the chance of her getting an odd number?

Simplify your answers.

The chance of the spinner landing on an even number when she spins it is 3/6, which can be simplified to 1/2.

a) What is the chance of her getting a square number?

b) What is the chance of her getting an odd number?

Simplify your answers.

*Answer: 1 and 4 are square numbers, so the chance of her getting a square number is 2/6, which can be simplified to 1/3. 1, 3 and 5 are odd numbers, so the chance of her getting these numbers is 3/6, which can be simplified to 1/2.*

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