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Definition of Sets

Which of the ...

Question

Which of the following collections are sets?
Rich people in your city

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Solution

No, it is not a set because it is not well defined, and there is no set parameter which can decide whether a person is rich or not.

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Similar questions

Q. Which of the following collections are sets?
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(ii) The collection of natural number less than 50.
(iii) the collection of most talented persons of India.
(iv) the collection of first ten prime integers.
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(vi) The collection of some months in a year.
(vii) the collection of all books in your school library.
(viii) the collection of smart boys in your class.
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(x) The collection of students in your class who got a lot of marks in the first unit test.

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Which of the following collections are sets ? Justify your answer :

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(iii) The collection of all girls in your class.

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