If X and Y are two sets such that X Y has 18 elements, X has 8 eleme – McqOptions

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1.	If X and Y are two sets such that X Y has 18 elements, X has 8 elements, and Y has 15 elements, how many elements does X Y have?
A.	5
B.	7
C.	9
D.	11
Answer» B. 7

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