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Which of the following are sets? Justify your answer.

(i) The collection of good books
(ii) The collection of prime numbers less than 30
(iii) The collection of ten most talented mathematics teachers.
(iv) The collection of all students in your school
(v) The collection of all even numbers
what do it mean


Option(ii) because set is the collection of well defined object and option(i),(iii)are not well defined

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The collection of good books
the collection of ten most talanted mathematics teacher
the collection of all students in school
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