A student multiplied by instead of multiplying by By how much was his answer greater than the correct answer?
The student multiplied the number by instead of
We need to find out
We need to find out by how much was his answer greater than the correct answer?
As per the given conditions
The student had to multiply by
So which is the correct one
But the student multiplied by
So which is the wrong one
Thus the difference between the correct and the incorrect value can be calculated by subtracting the two above obtained equations (i) and (ii). That is
Taking out as the common factor
Hence, the first answer was greater than the second one by the value