Neco 2020 Mathematics Question 42
Practice objective / multiple choice question 42 from the 2020 Neco Mathematics examination.
In a universal set \(U\) there are 20 elements. Sets \(A\) and \(B\) satisfy \(|A| = 12\), \(|B| = 9\) and the complement of \(A\) (that is \(U\setminus A\)) is a subset of \(B\). It is also given that \(|A \cup B| = 15\). Find the number of elements in \(U\).
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About This Question
This is Neco 2020 Mathematics Question 42. It is one of the objective questions from the 2020 Neco Mathematics examination.
Difficulty level: Medium .
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