Answer:
There are questions on this exam.
Step-by-step explanation:
Let denote the number of questions on this exam in total (including the first questions.)
There would be questions after the first .
Since the student got three-quarters of these wrong, only one-quarter () of these questions are correct. That would be another right answers.
In total, the number of questions that the student got correct would be:
.
On the other hand, it is given that the student got of the questions right. Hence, the number of correct answers may also be expressed as:
.
Both expressions give the number of correct answers. Equate the two expressions and solve for :
.
.
.
.
.
In other words, there are questions on this exam in total.