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2014-06-11T13:41:48+05:30

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Sets are used in maths as 
  \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] ,this is called a set of a no.
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a set is basically a group or collection of data...eg a set of natural numbers till 10
A={1,2,3,4,5,6,7,8,9,10}
2014-06-11T14:13:57+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The word set is used for a collection of objects of any kind, whatsoever, whereby given any object, we can say with certainity whether the object belongs to that collection or not. In other words,a set is a collection of well defined objects.
Sets can be specified by any of the following methods
1) Description method
2) Tabular form or the Roster method
3) Rule method or the Set builder form
Hope it helps u
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