A person makes a profit of 10% on 25% of the quantity and a loss of 20% on the rest. What is the percentage gain or loss on the whole?
সমাধান
সঠিক উত্তর: Option B
If whole quantity is 100
10% profit from 25% is = 25*110/100 = 27.5
20% loss from 75% is = 75*80/100 = 60
Total price of selling = 60 + 27.5
= 87.5
We can see that there has been a loss.
Loss is = 100 - 87.5 = 12.5 or 12.5%
