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

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1.Set Theory

easy

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

$\{1,2,5\}\subset A$

Option A

Option B

Option C

Option D

Solution

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

The statement $\{1,2,5\}\subset A$ is correct because each element of $\{1,2,5\}$ is also an element of $A.$

Standard 11

Mathematics

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