###
**A shopkeeper earns a profit of 12% on selling a book at 10% discount on the printed price. The ratio of the cost price and the printed price of the book is:**

A. 45 : 56
B. 45 : 51
C. 47 : 56
D. 47 : 51
**Answer: Option A**

## Show Answer

Solution(By Apex Team)

$\begin{array}{l}\text{Let the CP be 100}\\
\mathrm{SP}=100+12\%\text{ of }100\\
\quad=112\\
\text{If the marked price be X , then}\\
\begin{array}{l}90\%\text{ of }X=112\\
\Rightarrow x=\frac{112\times100}{90}\\
\Rightarrow x=\text{ Rs. }\frac{1120}{9}\\
\text{Hence, required ratio}\\
\begin{array}{l}=100:\frac{1120}{9}\\
=900:1120\\
=45:56\end{array}\end{array}\end{array}$

## Related Questions on Profit and Loss

### A shopkeeper earns a profit of 12% on selling a book at 10% discount on the printed price. The ratio of the cost price and the printed price of the book is:

A. 45 : 56B. 45 : 51

C. 47 : 56

D. 47 : 51

### By selling a bicycle for Rs. 2,850, a shopkeeper gains 14%. If the profit is reduced to 8%, then the selling price will be:

A. Rs. 2600B. Rs. 2700

C. Rs. 2800

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C. A makes a profit of 20%

D. B loses 20%

### A person sold a horse at a gain of 15%. Had he bought it for 25% less and sold it for Rs. 600 less, he would have made a profit of 32%. The cost price of the horse was.

A. Rs. 3,750B. Rs. 3,250

C. Rs. 2,750

D. Rs. 2,250