Examine whether the following statements are true or false :
$\{ a,b\} \not\subset \{ b,c,a\} $
False. Each element of $\{a, b\}$ is also an element of $\{b, c, a\}$
Let $A=\{1,2,\{3,4\}, 5\} .$ Which of the following statements are incorrect and why ?
$\{1,2,5\}\in A$
$\{\varnothing\} \subset A$
Write the following sets in the set-builder form :
${\rm{\{ 5,25,125,625\} }}$
$A = \{ x:x \ne x\} $ represents
Which of the following are sets ? Justify your answer.
The collection of all boys in your class.
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