Probability theory
You calculate probabilities with the definition of Laplace.
Explanation
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.
HH
HT
TH
TT
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.
HistoryThe French astronomer Pierre-Simon Laplace (1749 - 1827) contributed a great deal to the calculation of probability. |