Given,
CP of cosmetics = Rs 360 per dozen
SP of a pair of cosmetics = Rs 80
We need to find the profit percentage.
Solution,
We know that,
1 dozen = 12 items
CP of 1 cosmetic = 360/12 = Rs 30
SP of 1 cosmetic = 80/2 = Rs 40
Profit = SP-CP
= Rs 40 - Rs 30
= Rs 10
Profit percentage is given by :
![\%=(profit)/(CP)* 100\\\\=(10)/(30)* 100\\\\=33.34\%](https://img.qammunity.org/2021/formulas/mathematics/college/erqwr9ye1qcp02hw6m9614405pddori3ta.png)
So, the profit percentage is 33.34%.