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10 cards from this deck
Estimate of probability based on actual experiments/trials
Times event happensTotal trials\frac{\text{Times event happens}}{\text{Total trials}}Total trialsTimes event happens
How many times you try the experiment
How often the thing you're interested in occurs
320\frac{3}{20}203 or 0.150.150.15 (15%)
16\frac{1}{6}61 or about 0.1670.1670.167 (16.7%)
2052\frac{20}{52}5220 or about 38%
More accurate/closer to true probability
When exact probability unknown or real-life situations
Real data from performing experiments
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