NCERT Exercise 1.1 Q1 - Sets
Question: State which collections are sets: (i) months beginning with J, (ii) ten most talented writers, (iii) eleven best cricket batsmen, (iv) boys in your class, (v) natural numbers less than 100, (vi) novels written by Munshi Prem Chand, (vii) even integers, (viii) questions in this chapter, (ix) most dangerous animals in the world.
Answer: Sets: (i), (iv), (v), (vi), (vii), (viii). Not well-defined sets: (ii), (iii), (ix).
Full step-by-step NCERT solution with diagrams on Something by Zero.