The correct answer is (b).
If a man sold two scooters each at the same price, and on one he gained 25% and on the other he lost 25%, then he did not make a profit or a loss. This is because the gain on one scooter is equal to the loss on the other scooter.
To calculate the profit or loss, we can use the following formula:
Profit or loss = Selling price – Cost price
In this case, the selling price is the same for both scooters, so the profit or loss will depend on the cost price. If the cost price is more than the selling price, then there will be a loss. If the cost price is less than the selling price, then there will be a profit.
In this case, the cost price is not given, so we cannot calculate the profit or loss. However, we can say that the man did not make a profit or a loss, because the gain on one scooter is equal to the loss on the other scooter.
Option (a) is incorrect because the man did not lose money. Option (c) is incorrect because the man did not make a profit. Option (d) is incorrect because the man did make a gain, but it was offset by a loss.