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Mathematics for IGCSE & O level - Sets (Section 1 - No. 34)

Which of the following accurately describes the meaning of the notation n(A)?
The complement of A.
The union of A and the empty set.
The number of elements in A.
The intersection of A and the universal set.

توضيح

n(A) indicates the cardinality of set A, or the total number of elements present in A.

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