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WORKBOOK

EXERCISES 5

1) Let the set A and the set B be any two subsets of U. Simplify the following expressions below as much
as possible.
a. (B A ) B 

A (A B) B  
b.



c. A B A

2) Let A and B be any two subsets of U. If n(U) 15,n(B A) 6,n(A B) 4     , find n(B )  .

n(A)  3 n(A B) 

3) Let A and B be any two sets. If 2 n(A B)  3 n(B)  , find n(A).

n(B A) n(A B) 3 


41 091math-wb-w3-(sets)