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time, we get a reading of the thermometer as 28 degree
Celsius. Is there any uncertainty in the outcome? NO...it is

certain and is WELL DEFINED in itself; as thermometer reads

what it actually is.

Hence, any OPERATION whose outcome is WELL DEFINED

is called EXPERIMENT (Here we have not defined the

Experiment scientifically).

 In contrary to this, an OPERATION whose outcome is

NOT WELL DEFINED is called RANDOM EXPERIMENT. If

not well defined the then what. The outcome of the

random experiment has two properties:

 ALL THE POSSIBLE OUTCOMES are known.

 The EXACT OUTCOME cannot be predicted IN

ADVANCED.

For Example;

Sample Space:

The set of all the possible number of outcomes of a random

experiment is known as sample space.

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