Question

Oranges are bought for $Rs10$ and $10$ oranges are sold for $Rs11$. The gain percent is______.

• A. $20\%$
• B. $21\%$
• C. $22\%$
• D. $24\%$

Answer 1

The correct option is B $21\%$

Let C.P. of each orange be Rs. x

Let S.P. of each orange be Rs. y

Given that C.P. of 11 oranges = Rs. 10

$\Rightarrow 11x=10\Rightarrow x=Rs.\frac{10}{11}=Rs0.909$

Given that S.P. of 10 oranges = Rs. 11

$\Rightarrow 10y=11\Rightarrow y=\frac{11}{10}=Rs1.1$

Here, SP > CP so it gain affair.

Gain % $=\frac{SP-CP}{CP}\times 100=\frac{\frac{11}{10}-\frac{10}{11}}{\frac{10}{11}}\times 100=\frac{12.1-10}{10}\times 10=\frac{2.1}{10}\times 100=21\%=21$

Option B is correct answer.