# Maths Exercise

Jul 8th, 2015
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Question 1: Which of the following are sets? Justify our answer. (i) The collection of all 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.

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Mathematics projectby viraatbindra Class XIChapter 1 SetsMathsExercise 1.1Question 1:Which of the following are sets? Justify our answer.(i) The collection of all 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 Munshi 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.Answer(i) The collection of all months of a year beginning with the letter J is a well-defined collection of objects because one can definitely identify a month that belongs to this collection.Hence, this collection is a set.(ii) The collection of ten most talented writers of India is not a well-defined collection because the criteria for determining a writers talent may vary from person to person. Hence, this collection is not a set.(iii) A team of eleven best cricket batsmen of the world is not a well-defined collection because the criteria for determining a batsmans talent may vary from person to person. Hence, this collection is not a set.(iv) The collection of all boys in your class is a well-defined collection because you can definitely identify a boy who belongs to this collection.Hence, this colle

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