Tick (✓) the correct answer


Tick (✓) the correct answer:

A bookseller sells a book for Rs 100, gaining Rs 20. His gain per cent is

(a) 20%

(b) 25%

(c) 22%

(d) none of these


(b) 25%



$=\mathrm{Rs} 80$

$\therefore$ Gain percentage $=\left(\frac{\text { gain }}{\mathrm{CP}} \times 100\right) \%$

$=\left(\frac{20}{80} \times 100\right) \%$

$=25 \%$



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