Question

Find out the number of elements in the following set:

$A=\{x|xϵN,2<x<4\}$.

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

The correct option is A $1$

We have to identify the type of set.
Given $A=\{x|x\in N,2<x<4\}$
$=\left\{3\right\}$ contains single element which is a singleton set.
Therefore $A$ is a singleton set.

Also, the number of elements in the above set is $1$.