# The language of probability

**The language of probability**

Probability is the use of maths to quantify chance. It is the measurement of the change an event will occur or not.

**Outcomes and events**

A given **event** can have a number of **outcomes**. For example, a six sided dice when thrown has a possibility of six **outcomes**. Likewise, a coin with two sides has two **outcomes**.

The is then further expanded to that fact that each outcome of a given event will have a probability or a chance of occurring. Therefore the chances of each outcome in a fair 6 sided dice will be .

**Two outcomes**

There can be a number of scenarios where there may only be two outcomes. For example:

- It will be sunny tomorrow.
- A child born will be a girl.
- A coin will show tails when it is flipped.

Point to note:

It is wrong to assume that because a scenario will only have two outcomes, they must be equally likely.

**The probability scale**

Probability is measured on a scale from 0 to 1.

**0** = an event is **impossible** or has no chance of occurring

**1 **= an event is **certain**.

Point to note:

Probabilities can be written as fractions, decimals and percentages.