Question 120

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

Solution

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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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