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Even though the outcomes of a few repetitions are uncertain , there is a regular pattern of outcomes when there are many repetitions . After reading about the English statistician Karl Pearson who tossed a coin 24,000 times with a result of 12,012 heads , one of the authors tossed a coin 2,000 times . The results were 996 heads . The fraction 996/2000 is equal to 0.498 which is very close to 0.5 , the expected probability . The theory of probability began with the study of games of chance such as poker .
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