Karan sells two articles for Rs.64.5. He sells 1st at 15% profit and 2nd at 20% loss. Find the amount of overall profit/loss if the cost price of 1st article is equal to the selling price of 2nd article.

3

                    CP       :          SP                     15% = \(\frac{3}{20}\)

1st   →          20       :           23                      20% = \(\frac{1}{5}\)

2nd  →           5        :           4         

Multiply 2nd article's ratios by 5 for getting CP of first  =  SP of 2nd

               CP     :      SP

1st   →     20     :       23

2nd  →     25      :      20

         ———————————

               45     :      43               Loss = 45 - 43 = 2R

Total SP ⇒ 43R = 64.5

Profit  ⇒  2R = 3 Ans.