Question

By selling 125 cassettes, a man gains an amount equal to the selling price of 5 cassette. Find the gain per cent.

Answer 1

Thanks for asking the question.
Let the selling price of each cassette=Rs.x
Selling price of 125 cassettes=Rs.125x
Profit gained=Rs.5x
CP=SP-Profit
CP=120x
Profit%=(profit/CP)*100
Profit%=(5x/120x)*100
Profit=4.150~4%
Hope it helps.