Which of the following is a true statement
$\{a\} \subseteq \{a, b, c\}$
$\{a\} \in \{a, b, c\}$
$\phi \in \{a, b, c\}$
None of these
The number of elements in the set $\{x \in R :(|x|-3)|x+4|=6\}$ is equal to
State which of the following sets are finite or infinite :
$\{ x:x \in N$ and ${x^2} = 4\} $
Write the following as intervals :
$\{ x:x \in R, - 4\, < \,x\, \le \,6\} $
Which of the following are sets ? Justify your answer.
A collection of novels written by the writer Munshi Prem Chand.
Which of the following are sets ? Justify your answer.
The collection of all the months of a year beginning with the letter $\mathrm{J}.$