Question:
Mark (✓) against the correct answer:
A man sells a bat for Rs 100 gaining Rs 20. His gain per cent is
(a) 20%
(b) 22%
(c) 18%
(d) 25%
Solution:
(d) 25%
$\mathrm{SP}=\mathrm{Rs} 100$
$\mathrm{Gain}=\mathrm{Rs} 20$
$\mathrm{CP}=\mathrm{Rs}(100-20)$
= Rs 80
Gain percentage $=\left(\frac{\text { gain }}{\mathrm{CP}} \times 100\right) \%$
$=\left(\frac{20}{80} \times 100\right) \%$
$=25 \%$
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