Question 124
If the cost price of 15 articles is equal to the selling price of 12 articles, find gain%
Solution
Let's say cost price of 15 articles is $$x$$
cost price of 12 articles will be = $$\frac{12x}{15}$$
selling price of 15 articles is = $$x$$
gain = $$\frac{3x}{15}$$
gain% = $$\frac{\frac{3x}{15}}{\frac{12x}{15}} \times 100$$ = 25
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