Question

A vendor bought 6 toffees for a rupee. How many for a rupee must he sell to gain 20%?

• A. 3
• B. 4
• C. 5
• D. 6

Hint:

To find the selling quantity for a desired profit percentage, adjust the unit price inversely based on the cost and desired gain.

Answer 1

The Correct Option is C

Step 1: Calculate the cost price per toffee and determine the selling price for a 20% gain.
\[ \text{Cost price per toffee} = \frac{1}{6} \text{ rupee} \] \[ \text{Selling price for 20% gain} = 1.20 \times \frac{1}{6} = \frac{1}{5} \text{ rupee per toffee} \]

Step 2: Determine how many toffees per rupee this selling price corresponds to.
\[ \text{Toffees per rupee at selling price} = \frac{1}{\frac{1}{5}} = 5 \]