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Event
☼ Event : The result of an experiment are known as events:
e.g. (i) If a coin is tossed head ( H ) and tail ( T ) are two different events.
(ii) 1, 2, 3, 4, 5, 6 are different even…
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Sample Space
☼ Sample Space : A set representing all possible outcomes of a random experiment is called a sample space and it is denoted by S or U.
Each outcome is called a sample point. The number of sample points…
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Unbiased Experiment
☼ Unbiased Experiment : If each outcome of the experiment is equally likely to occur, then the experiment is known as an unbiased experiment.
e.g. When we throw a coin, …
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Random Experimen
☼ Random Experiment ( or trial ) : An experiment which can result in anyone of the several possible outcomes is called a random experiment or a trial.
e.g. (i) Tossing of a coin is a rando…
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Examples(2)
(4) In how many ways 7 persons stand in a row, if three particular persons do not stand together ?
Soln. 7 persons can stand in a row in 7 ! = 5040 ways ––––––––– ( 1 )
Three particular person …
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