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10 cards from this deck
Proportion of times event occurs relative to total trials
No. of times event occursTotal trials\frac{\text{No. of times event occurs}}{\text{Total trials}}Total trialsNo. of times event occurs
Probability of an event
Stabilises and approaches true probability
Define the event of interest
Record outcomes, count occurrences, apply formula
1560=0.25\frac{15}{60} = 0.256015=0.25 or 25%
Increases accuracy of probability estimates
May be influenced by random variation
Relative frequency converges to theoretical probability
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