Question 92
A man purchased 11 booksfor Rs. 100 and sold at the rate of 10 books for Rs. 110. How much percentage of profit or loss he made on a book?
Solution
As per the given question,
The cost price of one book $$=\dfrac{100}{11}$$
The sale price of one book $$=\dfrac{110}{10}$$
Hence the required percentage $$=\dfrac{(11-9.09)\times 100}{9.09}$$
$$=\dfrac{1.91\times 100}{9.09}=21% Profit$$
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