Question

A man sells two radio at Rs.990 each. In one he gains 10% and in the other he losses 10%. What is his gain or loss per cent on the whole?

Answer 1

cost price of two radios =2×990 Ruppes=1980 Ruppes

for first radio=990+990×10/100 Ruppes=990+99 Ruppes=1089 Ruppes

for second radio=990-990×10/100 Ruppes=990-99 Ruppes=891 Ruppes

overall selling price of two radios=891+1089=1980 Ruppes

no profit or loss