Which of the following are sets ? Justify your answer.
A collection of novels written by the writer Munshi Prem Chand.
A collection of novels written by the writer Munshi Prem Chand is a well-defined collection because one can definitely identify a book that belongs to this collection.
Hence, this collection is a set.
Examine whether the following statements are true or false :
$\{ a,b\} \not\subset \{ b,c,a\} $
Let $A=\{a, e, i, o, u\}$ and $B=\{a, i, u\} .$ Show that $A \cup B=A$
Which of the following are examples of the null set
$\{ x:x$ is a natural numbers, $x\, < \,5$ and $x\, > \,7\} $
Which of the following are sets ? Justify your answer.
The collection of ten most talented writers of India.
Write the following intervals in set-builder form :
$\left[ { - 23,5} \right)$