Question

A store sells boxes of $6$ pens for $Rs.30$ each and boxes of $12$ pens for $Rs.48$ each The price per pen is what per cent less when purchased in a box of $12$ than in a box of $6$?

• A. $80$%
• B. $75$%
• C. $50$%
• D. $20$%

Answer 1

Answer: (D)

$20$%

$\Rightarrow$ A store sells boxes of 6 pens for $Rs.30$ then,

$\Rightarrow$ Price of 1 pen =$\frac{30}{6}=Rs.5$

$\Rightarrow$ Store also sells boxes of 12 pens for $Rs.48$ then,

$\Rightarrow$ Price of 1 pen = $\frac{48}{12}=Rs.4$

$\Rightarrow$ Let ${}^{\prime }{x}^{\prime }$ be the price percent less when purchased in box of 12 than in box of 6.

$\Rightarrow$ $x=\frac{5-4}{4}\times 100$

$\Rightarrow$ $x=20\%$