Which of the following pairs is NOT a valid representation of a Cartesian product?

{(a, b), (c, d)}

{(1, 2), (2, 1)}

{(x, y, z)}

{(3, 4), (4, 3)}

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Q1.

What is the Cartesian product of sets A = {1, 2} and B = {x, y}?

Q2.

If set A = {a, b} and set B = {1, 2, 3}, how many ordered pairs can be formed?

Q3.

Which of the following defines a relation?

Q4.

What is the total number of ordered pairs formed by A × B if A = {x, y} and B = {1, 2, 3, 4}?