Question

The collection of all difficult questions in the chapter on sets.​

Answer 1

Answer:

The collection of all question in this chapter is a set, because if a question is given then we can easily decide whether it is a question of the chapter or not. Clearly, the term 'difficult' is vague. So, the given collection is not well defined and therefore, it is not a set.

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Answer 2

Step-by-step explanation:

The collection of all difficult questions in the chapter on sets is called brain teasers or question paper