Question 40
By selling 100 oranges, a vendor gains the selling price of 20 oranges. His gain percent is
Solution
selling price of 100 oranges = cost price of 100 oranges = selling price of 20 oranges
selling price of 80 oranges = cost price of 100 oranges
gain % = $$ \frac{difference}{sold} \times 100 $$
= $$ \frac{100 - 80}{80} \times 100 $$
= 25%
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