Let A={1,2,{3,4}, 5} . Which of following statements are incorrect and why ? { { 3,4} } subset

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1.Set Theory

easy

Let $A=\{1,2,\{3,4\}, 5\} .$ Which of the following statements are incorrect and why ?

$\{ \{ 3,4\} \} \subset A$

Option A

Option B

Option C

Option D

Solution

$A=\{1,2,\{3,4\}, 5\}$

The statement $\{\{3,4\}\}\subset A$ is correct because $\{3,4\}\in\{\{3,4\}\}$ and $\{3,4\}\in A$

Standard 11

Mathematics

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