Question

A man buys some pens in rs. 4600, he sells 2/5 of it at 15% profit what loss % should he sell the remaining part so that there is no profit and no loss on the whole transaction ?

Answer 1

let the so of 1 pen be re1

nonprofit and no loss means sp=cp

4600=(4600*2/5*115/100)+(4600*3/5*X/100)

2/5 pens sold at profit + 3/5 pens sold at loss = cp