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Mathematics for IGCSE & O level - Sets (Section 1 - No. 14)

Which statements describe properties of the empty set, represented by the symbol {} or ∅?
The empty set is a subset of every set.
The empty set is a set containing no elements.
The empty set is equal to the universal set.
The empty set has an infinite number of elements.

توضیح

Empty sets have no members and are a subset of every set.

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