X∪Y has 60 elements and X∩Y has 10 elements

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If X and Y are two sets such that X has 40 elements, X∪Y has 60 elements and X∩Y has 10 elements, how many elements does Y have?
13
Oct
If X and Y are two sets such that X has 40 elements, X∪Y has 60 elements and X∩Y has 10 elements, how many elements does Y have? how many elements does Y have? If X and Y are two sets such that X has 40 elements X∪Y has 60 elements and X∩Y has 10 [...]
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Tags: how many elements does Y have? , If X and Y are two sets such that X has 40 elements , X∪Y has 60 elements and X∩Y has 10 elements ,