Q10 of 94 Page 134

By selling 130 cassettes, a man gains an amount equal to the selling price of 5 cassettes. Find the gain per cent.

Let × be the price of a cassette.


Selling Price of 5 cassettes = 5x.


Selling Price of 130 cassettes = 130x.


Cost Price of 130 cassettes = 130 × – 5x


= 125x


Gain = SP - CP


= 130 × – 125x


= 5x





= 4%


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