Probability is the chance of an event happening.

We have learned how to measure probability using two ways:

• The certainty scale

• Fractions

The certainty scale measures probability using 4 terms

• IMPOSSIBLE - NEVER GOING TO HAPPEN

• UNLIKELY- PROBABLY NOT GOING TO HAPPEN

• LIKELY- PROBABLY WILL HAPPEN

• CERTAIN- DEFINITELY WILL HAPPEN

METHOD #2

We can measure probability using a FRACTION

There are 2 ways for us to write our fraction.

• Standard form

• Numerical form

Numerical Form

Uses the fraction line (/)

ONLY numbers

Example : 4/5

Use the chatbox to send a fraction in numerical form.

Standard Method

uses the term "out of".

There is NO Fraction line

3 OUT OF 5

7 OUT OF 5

Use the chat box to send a fraction in STANDARD FORM

Let's practice !

Probability practice