Which of the following collections are sets ? Justify your answer :
(i) A collection of all natural numbers less than 50.
(ii) The collection of good hockey players in India.
(iii) The collection of all girls in your class.
Which of the following are sets ? Justify your answer.
(i) The collection of all the months of a year beginning with the letter J.
(ii) The collection of ten most talented writers of India.
(iii) A team of eleven best - Cricket batsmen of the world.
(iv) The collection of all boys in your class
(v) The collection of all natural numbers less than 100.
(vi) A collection of novels written by the writer Munahi Prem Chand.
(vii) The collection of all even integers.
(viii) The collection of questions in this chapter.
(ix) A collection of most dangerous animals of the world.