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If D is the set of month names having 30 days, what kind of set is D?

Answer and explanation

Correct answer: Finite set

The governing concept is the distinction between finite and infinite sets. The calendar has a fixed number of months, and exactly four have 30 days: April, June, September, and November. Thus D has four elements and is a finite set, so option A is correct. It is not empty because these months exist, not infinite because the yearly month list is bounded, and not unclear because membership is definite.

Related tags

SetsFinite-SetCalendarNumber SystemsClass 9 McqGeneral Chapter PracticeMathematics

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