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Find the Cardinal Number of the Indicated Set n(A)=8,n(B)=21n ( A ) = 8 , n ( B ) = 21

Question 250

Multiple Choice

Find the cardinal number of the indicated set. Use the cardinal number formula.
-If n(A) =8,n(B) =21n ( A ) = 8 , n ( B ) = 21 and n(A∪B) =25n ( A \cup B ) = 25 , what is n(A∩B) n ( A \cap B ) ?


A) 4
B) 12
C) 6
D) 2

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