Kevin O'Leary Blames Bad Scores in Schools on Unions
O'Leary said unions "keep mediocre teachers in place in every high school in America when we should be firing them." ...
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Union of two sets
For example, the union of set \(A\) and set \(B\) is written as \(A\)ᴜ\(B\). The union of set \(X\), set \(Y\) and set \(Z\) is written as \(X\)ᴜ\(Y\)ᴜ\(Z ...