The result of an experiment is called an outcome or elementary event,  and a combination of these is known simply as an event. Rolling an ordinary fair die is an experiment that has six possible outcomes: 1, 2, 3, 4, 5 or 6. Obtaining an odd number with the die is an event that has three favourable outcomes: 1, 3 or 5.

Random selection and equiprobable events 

The purpose of selecting objects at random is to ensure that each has the same chance of being selected. This method of selection is called fair or unbiased, and the selection of any particular object is said to be equally likely or equiprobable.

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