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Cost Price and Selling Price

A man buys 5 ...

Question

A man buys 5 pens for a rupee and sells them at 4 for a rupee, find his gain per cent.

A

$40 %$

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B

$50 %$

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C

$25 %$

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D

$20 %$

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Solution

The correct option is C
$25 %$

$C P o f 1 p e n = \frac{1}{5} = ₹ 0.20 S P o f 1 p e n = \frac{1}{4} = ₹ 0.25 g a i n = 0.25 - 0.20 = ₹ 0.05 g a i n % = \frac{0.05}{0.20} \times 100 g a i n % = 25 %$

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