Question

Which of the following is a variable?

$5,x,3.14,\frac{3x}{2x}$

• A. $3.14$
• B. $x$
• C. $\frac{3x}{2x}$
• D. $5$

Answer 1

The correct option is B $x$

A symbol whose value is not fixed and takes various values, is known as variable.

Here, 5 and 3.14 are constants.
Also, $\frac{3x}{2x}$ = $\frac{3}{2}$ which is also a constant.

But the value of $x$ is not fixed and can takes any value. So, $x$ is a variable.