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Numbers in General Form

Bunty buys pe...

Question

Bunty buys pens at $5$ for $R s 4$ and sells at $4$ for $R s 5$ . What is his gain $%$

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Solution

$C . P$ of $1$ pen $= 4 / 5 = 0.8 R s$
$S . P$ of $1$ pen $= 5 / 4 = 1.25 R s$
Gain $% = (S P - C P / C P) \times 100$
$= (0.45 / 0.8) \times 100$
$= 56.25 %$

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