It is given that, a scale reports a 15-pound weight as weighing 12.375 pounds.
The problem arose because , the staff or the working person,or some ignorant person who must be unaware of this machine has either by mistake or just to irk the person whose thing is getting weighed, must have changed the scale, due to that there is error in measurement of weight of that object or thing.
So,the option which demonstrates the statement correctly is:
