Question 68
If the cost price of 15 articles is equal to the selling price of 12 articles, find gain per cent.
Solution
Let cost price of 1 article = Rs. 20
=> Cost price of 15 articles = 15 * 20 = Rs. 300
Also, Selling price of 12 articles = Rs. 300
=> Selling price of 1 article = $$\frac{300}{12}$$ = Rs. 25
$$\therefore$$ Profit % = $$\frac{25 - 20}{20} \times 100$$
= $$\frac{1}{4} \times 100 = 25 \%$$
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