Question

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

Options

• 3

• 4

• 5

• 6

Answer 1

5
Explanation : 
The cost price of 1 toffee = ₹`1/6`
Let him sell x toffee in 1 rupee.

Then, selling price of 1 toffee = ₹`1/x`

∴ Profit = `(1/x-1/6)/(1/6)xx100`

⇒ 20 = `(1/x-1/6)/(1/6)xx100`

⇒ `1/x-1/6=20/100xx1/6=1/3`

⇒ `1/x=1/30+1/6=6/30=1/5`

⇒ `x = 5`