Relative frequencies are sometimes called experimental probalities. They are used to determine probablities based on an experiment or a situation. For instance if we toss a coin 100 times, and get 60 heads and 40 tails, we can estimate that the probabiltity of getting a heads in this situation is 3/5

So Relative frequency = Number of successful trials/total number of trials.


A survey of 100 people was taken to find out whether they were left-handed or right-handed. 12 people said they were left-handed.

Using our formula for relative frequency, we take the number of successful trials - i.e. the number of people who are left-handed. Then divide this number by the total number of trials i.e. the total number of people

so the relative frequency is 12/100 = 3/25 

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