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If X and Y are two sets such that X cup ...

If X and Y are two sets such that `X cup Y` has 18 elements, X has 8 elements and Y has 15 elements, how many elements does `X cap Y` have?

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A N EXCEL PUBLICATION-SETS-QUESTION BANK
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  2. If X and Y are two sets such that n (X) = 17, n (Y) = 23 and n (X cupY...

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  3. If X and Y are two sets such that X cup Y has 18 elements, X has 8 ele...

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