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A man sold 20 apples for Rs. 1000 and gained 20%. How many apples did he buy for Rs. 1000?
Selling price of 20 apples = 1000
gain = 20%
Cost price of 20 will be = $$\frac{1000 \times 100}{120} = \frac{2500}{3}$$
So on cost price of 1000 amount of apples will be = $$\frac{20 \times 3}{2500} \times 1000$$ = 24
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