Let $S=\{1,2,3,4\}$. The total number of unordered pairs of disjoint subsets of $S$ is equal to
Let $A=\{1,2,3,4,5,6\} .$ Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces:
$10 \, .........\, A $
Let $A=\{1,2,\{3,4\}, 5\} .$ Which of the following statements are incorrect and why ?
$1 \in A$
Which of the following are sets ? Justify your answer.
A team of eleven best-cricket batsmen of the world.
Write the following as intervals :
$\{ x:x \in R,3\, \le \,x\, \le \,4\} $