1. PROBABILITY
The probability of an event is a value that describes the chance or likelihood that the event will happen or that the event will end with a particular outcome

2. RANDOM EVENT
This is an activity for which there are a number of different possible endings that could occur.
Tossing a coin could land on heads or tails
Rolling a die – it could land on
1, 2, 3, 4, 5, 6
Choosing a queen of hearts out
of a deck of cards

3. OUTCOME This is the particular ending or conclusion of an event.
Every random event will have a different number of possible outcomes that could occur.

4. The probability scale and certain, impossible and uncertain events