Relative Frequency (9)

Calculate relative frequencies from given or collected data to estimate probabilities of events involving ‘and’ or ‘or’ (ACMSP226)

LO:To calculate relative frequency from given or collected data.


  • How to collect data
  • How to estimate probabilities of events


  • that calculating relative frequencies can help determine the probability of events occurring.


  • I can calculate relative frequency and estimate probability of events happening.

Relative Frequency

Relative frequency is how often something happens divided by all outcomes.

It is usually written as a decimal value.

To find relative frequency you just divide the frequency of the item by the total outcomes.

The total of each item’s relative frequency should always have a sum of 1.


Relative Frequency Videos

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