Question

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

Answer 1

gain = SP-CP

=SP of 5 cassettes = SP of 125 cassettes - CP of 125 cassettes

=CP of 125 cassettes = SP of 125 cassettes - SP of 5 cassettes

CP of 125 cassettes = SP of 120 cassettes

let the CP of 1 cassette be x

then CP of 120 cassettes = 120x

SP of 120 cassettes = CP of 125 cassettes=125x

therefore SP of 120 cassettes is greater than CP of 120 cassettes

therefore it's profit

profit = SP-CP

125x-120x = 5x

gain%=profit/CP*100

=5x/120x*100

=25/6%

Answer 2

answer refers to the attachment....

please mark as brainliest..