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

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 ?

Answer

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Knowledge Check

If the sets A has p elements, B has q elements, then number of elements is AxxB is

A

p+q

B

p+q+1

C

pq

D

`p^2`

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