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 proper subsets of the set $\{1, 2, 3\}$ is
Write down all the subsets of the following sets
$\{ a,b\} $
State which of the following sets are finite or infinite :
$\{ x:x \in N$ and $x$ is prime $\} $
Write the following intervals in set-builder form :
$\left( {6,12} \right]$
Write the following sets in the set-builder form :
$\{ 3,6,9,12\}$