arithmetic - the price of a vehicle passing through three hands rises on the whole by 65 if the first and the second sellers earned 20 and 25 profit respectively find the percentage profit earned by the third seller - skillgun

Solution: Let the original price of the vehicle be Rs. X and let the profit earned by the third seller be Y%.
Then, (100+Y)% of 125% of 120% of X = 165% of X.
[(100+Y)/100 * 125/100 * 120/100 * X] =165/100 * X.
100+Y = 165*100*100/(125*120) = 110 => Y= 10%