The smallest set A such that A ∪ 1, 2 = 1, 2, 3, 5, 9 is : - Vidyadip

MCQ

The smallest set $A$ such that $A ∪ \{1, 2\} = \{1, 2, 3, 5, 9\}$ is :

A
$\{2, 3, 5\}$
✓
$\{3, 5, 9\}$
C
$\{1, 2, 5, 9\}$
D
$\{1, 2\}$

✓

Answer

Correct option: B.

$\{3, 5, 9\}$

${3, 5, 9}$
$A ∪ \{1, 2\} = \{1, 2, 3, 5, 9\}$
Thus,
$A = \{1, 2, 3, 5, 9\} − \{1, 2\}$

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