### Probability theory

The definition of **probability** is the ratio between the number of favorable outcomes and the number of possible outcomes

P(G) =number of favorable outcomes number of possible outcomes

##### Explanation

If you play with a dice, the chance to throw a 1, 2, 3, 4, 5 or 6 is always the same. If you necessarily want to throw a 6 the chance of that is exactly . There is only 1 favorable outcome and there are 6 possible outcomes. You write this as

because you see that right away.

## HistoryThe French mathematician Siméon Poisson (1781 - 1840) contributed to probability theory. |