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WORKBOOK

Example 11: The sets A={1,2,3} and BUC={2,3,4,5} are given. Find the number of elements of set (AxB) U
(AxC).

3. A x (B ∩ C) = (A x B) ∩ (A x C)

Example 12(2005 OSS): The sets A = {a, b, c, d}, B={b, c, d, e, f, g, k, l}, C={c, d, e, r} are given. Find the
number of elements of AxB  AxC .

4. A x ( B \ C) = (A x B) \ (A x C)

Example 13: The sets A  {x 1 x 5  x N} , B  {y 1 y 2  9, y N} , C = {1,3,5} are given. Write the

elements of the set (A  B) x (B\C)

5. n(A x B) = n(B x A) = n(A) .n(B)

Example 14: IfA  x: 2 x 5,x     andB  x: 3 x 3,x    , then find n(AxB).

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