Question

By giving a discount of 10% on the marked price of Rs 1,100 of a sewing machine a dealer gains 10%, then the cost price is

• A. Rs 900
• B. Rs 950
• C. Rs 1,000
• D. Rs 1,050

Answer 1

The correct option is A Rs 900

Market price $=1100$

Discount of $10\%$ is given on marked price,

So selling price will be$=1100-1100\times \frac{10}{100}$

$=(1100-110)$

$=990$

Even after giving discount of $10\%$, dealer gains $10\%$ on cost price,

If selling price is $110$, cost price will be $100$

If selling price is $990$, cost price will be$=\frac{100}{110}\times 990$

$=900$

Cost price is $Rs900$