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Probability - an Experimental Approach

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The likelihood of something  happening is called the probability.
Terms related to probability:

Experiment :
 An activity which produces an outcome or result is called an experiment.

random Experiment :  An Experiment in which exact outcome cannot be predicted in advance.
For example: 
1) rolling a dice 
2) Drawing a card from well-shuffled pack of playing cards 
3) Tossing a coin

Trial :  Performing an experiment is called a trial.

Event :  Each possible outcomes of an experiment is called event.

Probability of an event : In a random experiment if 'n' is the total number of trials, then the empirical probability of the event E is P(E).

P(E) =

`"Number of trials happened in which event happened" / " Total number of trials"`

i.e. P(E) =`"Number of trials happened in which event happened" / n `

The Probability of an event lies between 0 and 1 (0 and 1 inclusive).

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