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WORKBOOK
4) Let A and B be any two sets. If n(A B ) 6,n((A B) ) 14 , find n(A’).
5) If n(A B) 15, n(A B) 6 , and n(A) 2 n(B) , find n(B A) .
6) Let A and B be any two sets. If 3 n(A B) 4 n(B A) 6 n(A B) and n(A B) 27 , then find
n(A) n(B) .
7) Out of 45 students in a class 15 select English, 13 don't select Math, 6 select none of them. How many
of them take one subject only?
42 091math-wb-w3-(sets)