Answer Bank (21)/(20) (20)/(21) (21)/(29) (29)/(20)

The question is asking for the probability of a student passing the exam. The probability of an event is calculated by dividing the number of favorable outcomes by the total number of outcomes. In this case, the favorable outcome is the student passing the exam, and the total number of outcomes is the total number of students. The probability of a student passing the exam is given as $\frac {21}{20}$. This means that out of every 20 students, 21 are expected to pass the exam. This is a higher probability, indicating that a majority of students are expected to pass the exam.