Question

Find the missing entry:

Quantity	1	3	5	7
Price	50	150	250	__

• A. 200
• B. 450
• C. 300
• D. 350

Answer 1

The correct option is D 350

We can see that the price increases as the quantity increases.
Also,
$\frac{1}{50}=\frac{3}{150}=\frac{5}{250}$

$\text{So, Quantity}\propto \text{Price}$
$\text{Let, the missing entry be}y\text{.}$
$\therefore \frac{1}{50}=\frac{7}{y}$
$\Rightarrow y=\frac{7\times 50}{1}=350$