Q1 of 145 Page 4

Which of the following are sets? Justify your answer.

The collection of all short boys of your class.


As the collection of all short boys of your class may vary to person to person. Maybe someone consider short boys of height less than 120 cm and maybe someone consider short boys of height less than 90cm. Here, the set is not well – defined.

∴, this is not a set.


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