QUESTION

# A trader has a weighing balance that shows 1,200gm for a kilogram. He further marks up his cost price by 10%. Then the net profit percentage isA) 32%B) 23%C) 31.75%D) 23.5%

Let us suppose the cost price of one gram to be Rs.1, then the mark up price =$1+\left( 1\times \dfrac{10}{100} \right)=Rs.1.1$
Now he sells 1000gm which seems to be 1200gm so he charges a customer $1200\times 1.1=Rs.1320$for 1000gm.
As we know that profit % $=\dfrac{S.P-C.P}{C.P}\times 100$ where S.P is selling price and C.P is cost price.
Thus, his profit % = $\dfrac{1320-1000}{1000}\times 100=32%$.