When you toss a coin, there is an equal chance of obtaining a head or a tail. But in some cases, instead of using equally likely outcomes you need to use ārelative frequencyā.

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Try out these example questions about relative frequency.

- Question
Q1. people were asked whether they were left-handed. Four people answered 'yes'. What is the relative frequency of left-handed people?

Q2. A white counter was taken from a bag of different coloured counters, and then replaced. The relative frequency of getting a white counter was found to be . If the bag contained counters, estimate the number of white counters.

A1. The relative frequency is:

= or

A2. The relative frequency of white counters is , and there are counters in the bag. So, as an estimate, are white counters.

Relative frequency can only be used as an estimate for a true probability.