Question 120

The cost price of 18 articles is equal to the selling price of 15 articles. The gain percent is

Solution

Let CP and SP be the cost price and selling price respectively of 1 article.

Given, 15SP=18CP

15SP=15CP +3CP

=>profit= 3CP as SP=CP + profit

gain%=$$\frac{\textrm{profit}}{\textrm{cost price}} \times 100$$%=$$\frac{3CP}{15CP} \times 100$$%

=20%

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