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Probability theory

You calculate probabilities with the definition of Laplace.



Suppose you have two coins with which you are going to toss. Each piece has a head (H) and a tail (T) side. After you have thrown them both you can get 4 different combinations.


For each combination, the probability is the same, and so is 1/4. If we make no difference between HT and TH we can conclude that the following probabilities arise

HH       = 1/4
TT       = 1/4
HT or TH = 2/4

If you have a large number of throws, and then think of some billions, it turns out that this is fairly correct.



The French astronomer Pierre-Simon Laplace (1749 - 1827) contributed a great deal to the calculation of probability.

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