Question

Fill in the blank.

$$\begin{array}{ccccc}\text{x}& 100& 75& 50& 25\\ \text{y}& 60& 80& & 240\end{array}$$

• A. 120
• B. 400
• C. 350
• D. 450

Answer 1

The correct option is A

120

According to the given details in the table, we know that it's an inverse proportion.

AB = constant
$A_1\times B_1$ = $A_2\times B_2$

Let the blank be "y".

The equation formed will be,
$100\times 60=75\times 80=50\times y=25\times 240$

$\Rightarrow 6000=6000=50y=6000$

$y=\frac{6000}{50}$

$\therefore y=120$