Tick (✓) the correct answer

Question:

Tick (✓) the correct answer:

The ratio of cost price and selling price of an article is 20 : 21. What is the gain per cent on it?

(a) $5 \%$

(b) $5 \frac{1}{2} \%$

(c) $6 \%$

(d) $6 \frac{1}{4} \%$

 

Solution:

(a) $5 \%$

$\mathrm{CP}=$ Rs. $20 x$

$\mathrm{SP}=$ Rs. $21 x$

Gain = Rs. $(21-20)$

= Rs. X

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

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

$=5 \%$

 

 

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