Question

If at 15% profit, the selling price of a dozen pencils is Rs.13.80; then what is the cost price of a pencil?

Answer 1

Here is your answer !!!

CP = (100 * SP)/(100+gain)
100 * 13.80/115
12 for one dozen pencil
here cost price of one pencil so 12/12=1

Hope , it will help you.

Answer 2

Answer:

The cost price of a pencil is Rs.1.

Step-by-step explanation:

Given : If at 15% profit, the selling price of a dozen pencils is Rs.13.80.

To find : What is the cost price of a pencil?

Solution :

The selling price of a dozen or 12 pencils is Rs.13.80.

Profit % is 15%.

The cost price of a dozen pencil is

$CP=\frac{SP}{100+P\%}\times 100$

$CP=\frac{13.80}{100+15}\times 100$

$CP=\frac{1380}{115}$

$CP=12$

i.e. The cost price of a dozen or 12 pencils is Rs.12.

The cost of a pencil is $\frac{12}{12}=1$

Therefore, The cost price of a pencil is Rs.1.