A discount dealer professes to sell his goods at cost price but uses a weight of 960, gms instead of

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7.Profit and Loss

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A discount dealer professes to sell his goods at cost price but uses a weight of $960\, gms$ instead of a $Kg$ weight. Find his gain $\% ?$

A

$6.75$

B

$2.66$

C

$4.16$

D

$5.25$

Solution

Here, True weight $=1000 g$.

False weight $=960 g$.

Error change $=(1000-960) g .=40 g$

$\Rightarrow \operatorname{Gain} \%=\frac{\text { Error change }}{\text { True weight – Error }} \times 100 \%$

$=\frac{40}{1000-40} \times 100 \%=\frac{25}{6} \%$

Standard 13

Quantitative Aptitude

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