Basic probability/ part 1

Basic probability
Probability or chance can be measured on the scale which runs from zero, reperesents impossibilty to one, which reperesents certainty . A samle space , is the set of all possible outcomes of an random experiment.
A random experiment , is an experiment which we can not predicte its outcomes, that is , each of its outcomes has the same chance in apperance, that means each of its outcoes has the same probability
.
Combinations of the events

br>The complete of an event A, means that , this event can not occur.
The union of two events A and B, means that, A or bor the both A and B occut.
The intersection of two event A and B , means that the both A and B occur

Mutually execlusive events

means thant, the intersection between any two of them equal empty
set.
Independence

The event A and B are said to be in dependened if the probability equal to the product of their probabilitys