A man buys a certain number of articles at 15 for Rs. 112.50 and sells them at 12 for Rs. 108. Find ;
i) his gain as percent ;

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Solution

Cp of $15$ articles $= 112.50$
Cp of $1$ articles $= 7.5$ Rs.
Sp of $12$ articles $= 108$
Sp of $1$ article $= 9$ Rs.
Gain $% = \frac{S p - C p}{C p} \times 100$
$= \frac{9 - 7.5}{7.5} \times 100$
$= 20 %$ .

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A man buys a certain number of articles at 15 for Rs. 112.50 and sells them at 12 for Rs. 108. Find ;i) his gain as percent ;

Cp of 15 articles =112.50Cp of 1 articles =7.5 Rs.Sp of 12 articles =108Sp of 1 article =9 Rs.Gain %=Sp−CpCp×100=9−7.57.5×100=20%.

A man buys a certain number of articles at 15 for Rs. 112.50 and sells them at 12 for Rs. 108. Find ;
i) his gain as percent ;

Cp of $15$ articles $= 112.50$
Cp of $1$ articles $= 7.5$ Rs.
Sp of $12$ articles $= 108$
Sp of $1$ article $= 9$ Rs.
Gain $% = \frac{S p - C p}{C p} \times 100$
$= \frac{9 - 7.5}{7.5} \times 100$
$= 20 %$ .