Question

If B $\times$ A = {(x, a), (x, b), (x, c), (y, a), (y, b), (y, c), (z, a), (z, b), (z, c)} Find set A and set B.

• A. A = (x, y, z) B = (a, b, c)
• B. A = (a, b, c) B = (x, y, z)
• C. A = (a, x, y) B = (b, c, z)
• D. C = (b, z, x) B = (c, b, y)

Answer 1

The correct option is B

A = (a, b, c) B = (x, y, z)

B $\times$ A = {(x, a), (x, b), (x, c), (y, a), (y, b), (y, c), (z, a), (z, b), (z, c)}

Set A = set of second element in each group

Set B = set of first element in each group

A = {a, b, c}
B = {x, y, z}