UPSKILL MATH PLUS

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1. If two finite sets \(A\) and \(B\) have the same number of elements, then they are called as .
 
2. An empty set is a subset of an .
 
3. If set \(A\) is a subset of set \(B\) and \(A\) is not equal to \(B\), then \(A\) is called   of \(B\)