Simple




Example

The probability of drawing the ace of spades from a pack of cards is 1 in 52 (1.92%) since there are 52 cards in a pack.

The probability of drawing any ace from a pack of cards is 4 in 52 (7.69%).


When an event will definitely occur the probablity is 1.
If an event can never occur then the probability is 0.


The probability of an event ranges from 0 to 1.
The sum of probabilities of all possible events equals 1.





Complement

The complement of an event is the event not occurring
This is denoted by P(A')





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