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WORKBOOK

Example 27: A and B are two sets. 2() = 3(), ( ∩ ) = 2 and n(A B) =13. Find the number of
subsets of B\A.

Example 28: A and B are two sets. 3 elements of A differ from B and 2 elements of B differ from A. If the
number of subsets of A  B is 16, find n (A  B).

Example 29: In a class of 40 students who play at least one of the games, 15 like to play basketball and
football and 20 like to play basketball. How many students like to play only football but not basketball?

Example 30: Write a set represented by the given shaded region.

a) b) A B
A B

C
C
28 091math-wb-w3-(sets)