A seller uses faulty weight in place of a 2 kg weight and earns a 25% profit. He claims that he is selling on the cost price in front of the customers but uses a faulty weight. How much error is there in the 2 kg weight to gain 25%?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 400 g.
Given that
A seller uses faulty weight in place of a 2 kg weight and earns a 25% profit
He claims that he is selling on the cost price but using faulty weight
Let the error be n
Formula used
Profit % = [Error/(True weight - Error)] × 100
Calculation
25 = [n/(2000 - n)] × 100
n/(2000 - n) = 25/100 = 1/4
4n = 2000 - n
5n = 2000
n = 2000/5 = 400 g