Introduction to Sets

1. n(A∪B∪C) = n(A) + n(B) + n(C) - n(A∩B) - n(C∩A) - n(B∩C) + n(A
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Cardinality of a set

• The cardinality of a set is a positive integer but it is not decimal. So, n(A)  is no...}
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