If A × B = (1, a), (1, b), (1, c), (2, a), (2, b), (2, c) then fi… - Vidyadip

MCQ

If A × B = {(1, a), (1, b), (1, c), (2, a), (2, b), (2, c)} then find set A:

A
{1}
B
{1, 2}
C
{1, a}
D
{a, b, c}

✓

Answer

{1, 2}

Solution:

In each ordered pair of A × B, first element belongs to set A and second element belongs to set B.

1, $ 2 ∈\text{A} $ so, $ \text{A} = {1, 2}.$

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