Which of the following are sets. Explain your answer. (a). The collection of all day in a week which have the first letter S. (b). The collection of ten most famous singers of India. (c). A group of best football strikers of the world. -Other
(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 the ten most talented writers of India is not a well-defined collection because the criteria for determining a writer’s talent 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 batsman’s talent may vary from person to person. Hence, this collection is not a set.